{"title":"NEW RELEASES","description":"","products":[{"product_id":"douk-audio-4-way-audio-switcher-splitter-5-band-stereo-eq-preamp","title":"Douk Audio D5 4-Way Audio Switcher\/Splitter with EQ Preamp","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003e1-IN-4-OUT Flexible Splitter: Easily connect up to four amplifiers or active speakers etc. Choose any combination of outputs to work simultaneously, allowing for effortless comparisons or multi-device listening\u003c\/span\u003e\u003cspan\u003e, offering unmatched flexibility for your home audio setup.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003e4-IN-1-OUT Audio Switcher: \u003c\/span\u003e\u003cspan\u003eEasily switch between four different audio sources such as phones, tablets or players. Say goodbye to constant plugging and unplugging, and quickly compare multiple sources. Ideal for anyone needing seamless switching.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"359\" data-start=\"66\"\u003e\n\u003cp data-end=\"359\" data-start=\"69\"\u003e\u003cspan\u003e5-Band Equalizer with EQ Bypass: Fine-tune your sound with precise frequency adjustments at 80Hz, 330Hz, 1KHz, 3.3KHz, and 10KHz. Or switch to EQ Bypass mode for a direct, unaltered signal to your speakers or headphones, giving you full control over your sound. \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRetro-Style VU Meter: Features a large analog VU meter with 6-level backlight and gain adjustment, providing real-time visual feedback of the music's dynamics. Housed in a compact metal enclosure, it combines vintage charm with long-lasting durability.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"359\" data-start=\"66\"\u003e\u003cspan\u003eHeadphone Amplifier for Personal Listening: The D5 also doubles as a headphone amplifier, offering decent performance for personal listening. Enjoy rich, detailed audio for your headphones, enhancing every note with precision and clarity.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cstrong data-end=\"75\" data-start=\"26\"\u003eQ: Does the D5 come with a power supply?\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong data-end=\"84\" data-start=\"78\"\u003eA:\u003c\/strong\u003e\u003cspan\u003e Yes. Please use the supplied DC 5V\/2A power adapter for optimal performance. If using \u003c\/span\u003e\u003cspan\u003eother\u003c\/span\u003e\u003cspan\u003e power supply, ensure it provides at least 2A current. Otherwise, the D5 may not function properly.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp data-end=\"473\" data-start=\"282\"\u003e\u003cstrong data-end=\"354\" data-start=\"282\"\u003eQ: Can all four channels output simultaneously in \"1-IN-4-OUT\" mode?\u003c\/strong\u003e\u003cbr data-end=\"357\" data-start=\"354\"\u003e\u003cstrong data-end=\"363\" data-start=\"357\"\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYes, in \"1-IN-4-OUT\" mode, all four channels can output simultaneously, with D5 acting as an audio splitter.\u003c\/p\u003e\n\u003cp data-end=\"666\" data-start=\"480\"\u003e\u003cstrong data-end=\"511\" data-start=\"480\"\u003eQ: Can I use D5 as a 4-IN-1-OUT mixer?\u003c\/strong\u003e\u003cbr data-end=\"514\" data-start=\"511\"\u003e\u003cstrong data-end=\"520\" data-start=\"514\"\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eD5 does not support individual volume control for each channel, so it is not recommended as a mixer. However, it works effectively as a switcher.\u003c\/p\u003e\n\u003cp data-end=\"885\" data-start=\"673\"\u003e\u003cstrong data-end=\"728\" data-start=\"673\"\u003eQ: Why is there no sound when the RCA I\/O port is connected?\u003c\/strong\u003e\u003cbr data-end=\"731\" data-start=\"728\"\u003e\u003cstrong data-end=\"737\" data-start=\"731\"\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 3.5mm Priority jack takes priority over the RCA I\/O port. To use the RCA I\/O port, please ensure the Priority jack is not connected.  \u003c\/p\u003e\n\u003cp data-end=\"1104\" data-start=\"892\"\u003e\u003cstrong data-end=\"930\" data-start=\"892\"\u003eQ: There is noise during operation. What should I do?\u003c\/strong\u003e\u003cbr data-end=\"933\" data-start=\"930\"\u003e\u003cstrong data-end=\"939\" data-start=\"933\"\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIf noticeable noise occurs, please try toggling the GND switch on the rear panel. Switching it on or off can resolve most ground loop issues, but we cannot guarantee 100%.\u003c\/p\u003e\n\u003cp data-end=\"1304\" data-start=\"1111\"\u003e\u003cstrong data-end=\"1164\" data-start=\"1111\"\u003eQ: Is volume control available in EQ bypass mode?\u003c\/strong\u003e\u003cbr data-end=\"1167\" data-start=\"1164\"\u003e\u003cstrong data-end=\"1173\" data-start=\"1167\"\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYes, volume control remains available in EQ bypass mode.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Nobsound\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: D5\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio input: 3 groups of RCA \/ 1*3.5mm AUX\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio output: 3 groups of RCA \/ 1*3.5mm Jack\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWorking mode: 1-IN-4-OUT \/ 4-IN-1-OUT\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e4-Channel simultaneous output: Support\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency adjustment: 80Hz\/330Hz\/1KHz\/3.3KHz\/10KHz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEQ adjustment range: ±10dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEQ bypass mode: Support\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput impedance: 50KΩ\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutput impedance: 10Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency response: 20Hz-20KHz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMatched headphone impedance: 32-200Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHeadphone output power: 150mW@32Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVU meter backlight brightness adjustment: 6 levels\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVU meter swing range adjustment: Support\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWorking voltage: DC 5V\/≥2A\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W*D*H):  130*80*104mm \/ 5.12*3.15*4.09in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage dimensions (W*D*H): 210*185*100mm \/ 8.27*7.28*3.94in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet weight: 685g \/ 1.51lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage weight: 1.0kg \/ 2.20lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking list\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* D5 Audio Selector\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e1* DC 5V Power Adapter\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Type-C Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Screwdriver\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":47544764956904,"sku":"XX-D5-US","price":109.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47544764989672,"sku":"XX-D5-UK","price":109.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47544765022440,"sku":"XX-D5-DE","price":109.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47544765055208,"sku":"XX-D5-AU","price":109.99,"currency_code":"USD","in_stock":true},{"title":"Other","offer_id":47544765087976,"sku":"XX-D5","price":109.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/000_9c3c3306-8756-46a7-b69a-f0626ce49740.jpg?v=1753953920"},{"product_id":"douk-audio-g7-2-0-4-0-channel-digtial-amplifier","title":"Douk Audio G7 2.0\/4.0 Channel Digital Amplifier","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-end=\"492\" data-start=\"220\"\u003e\n\u003cspan\u003e2\/4 Channel Outputs for Flexible Listening: W\u003c\/span\u003e\u003cspan\u003eith 2 sets of switchable or simultaneous speaker outputs for A\/B testing or dual-zone setups. Perfect speaker selector\/switcher for bookshelf and floor-standing speakers in any audio setup.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"760\" data-start=\"494\"\u003e\n\u003cspan\u003eVersatile Inputs for Seamless Integration: \u003c\/span\u003e\u003cspan\u003eBalanced XLR+TRS combo and dual RCA inputs ensure clean, noise-free audio with pro-grade compatibility, making it the best match for high-performance DACs and streamers like the Eversolo players.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"1026\" data-start=\"762\"\u003e\n\u003cspan\u003eFlagship Chipset for Optimal Performance: \u003c\/span\u003e\u003cspan\u003eEquipped with 2PCS TPA3255 chips delivering up to 300W×2 or 150W×4 output. Paired with an internal 48V\/10A GaN power module for efficient performance, and mastered by NJW1194 IC and OPA1612 op-amps for pristine audio quality.  \u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"1291\" data-start=\"1028\"\u003e\u003cspan\u003eTone Control \u0026amp; Pure Bypass Mode: Enjoy ±10dB of bass and treble shaping, also engaging the Bypass Mode disables the tone and volume circuits. Enjoy the ultimate flexibility of an integrated amp or the uncolored, original signal path of a pure power amp for critical listening. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"1563\" data-start=\"1293\"\u003e\n\u003cspan\u003eIconic VU Meters \u0026amp; Smart Control: The large, retro blue VU meters\u003c\/span\u003e\u003cspan\u003e with AGC provide captivating, real-time visual feedback. Modern convenience is built-in with 12V trigger for synced power, full-function remote, instant mute, creating a fully immersive HiFi audio system.  \u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003eQ: Is volume control available in Bypass Mode?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong\u003eA: \u003c\/strong\u003eNo, in Bypass Mode, both volume and tone control are unavailable. The amplifier's volume is set to maximum by default. Please lower the source volume before switching to this mode to prevent hearing damage and speaker damage.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003eQ: What should I use the 12V trigger input for?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong\u003eA: \u003c\/strong\u003eThe 12V trigger input is for preamps or DACs with a trigger output to sync power on\/off. Please do not use it as an audio input or connect to a power supply.  \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003eQ: Are there any specific requirements for the speakers connected to the A and B channels?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong\u003eA: \u003c\/strong\u003eIt is recommended to use speakers of 4-8Ω with matching impedance for each channel. For example, use two 4Ω speakers for channel A output and two 8Ω speakers for channel B output.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003eQ: Does the remote control include batteries?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong\u003eA: \u003c\/strong\u003eFor safer and faster delivery, the remote control may not include batteries (AAA*2). Please prepare the batteries yourself.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003eQ: Can the brightness and color of the VU meter be adjusted?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong\u003eA: \u003c\/strong\u003eNo, the brightness and color of the VU meter are fixed and cannot be adjusted.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: G7\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio input: 2 groups of RCA\/TRS+XLR combo input\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio output: 2 groups of Banana speaker jacks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAmplifier chips: 2×TPA3255\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNumber of channels: Selectable 2-channel \/ 4-channel\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax. output power: 300W*2@4Ω (2-channel output); 150W*4@4Ω+4Ω (4-channel output)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBuilt-in power supply: DC 48V\/10A\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOp-amp chips: 3×OPA1612\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency response: 20Hz-20kHz (±0.5dB)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTHD+N: 0.002%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSNR: ≥112dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput sensitivity: RCA: 2V; TRS+XLR: 4V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMatched speaker impedance: 4-8Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTreble\/bass range: ±10dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVU Meter Dimensions: 85*45.4mm \/ 3.34*1.79in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMute function: Supported\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBypass function: Supported\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRemote control: Supported\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput voltage: AC 100-240V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W*D*H): 275*190*78mm \/ 10.83*7.48*3.07in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage dimensions (W*D*H): 435*265*110mm \/ 17.12*10.43*4.33in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet weight: 3.34kg \/ 7.36lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage weight: 5kg \/ 11.02lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cp\u003ePower Output Table of\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003et\u003c\/span\u003ehe\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eG7\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe power specifications are estimated values. Actual performance may vary based on usage conditions.\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan\u003e\u003ca rel=\"noopener\" target=\"_blank\"\u003e\u003cimg src=\"https:\/\/image.pushauction.com\/0\/0\/a0e33258-4283-401f-a9c9-cfdc68581dd2\/2d63c7af-435f-407c-9ec4-9188b76d545c.jpg\" alt=\"\" width=\"602\" height=\"337\"\u003e\u003c\/a\u003e\u003cbr\u003e\u003c\/span\u003e\u003chr\u003e\n\u003cp\u003ePacking List\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* G7 Amp\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Remote Control\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Power Cord\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":47605397422312,"sku":"SUC-G7-US","price":299.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47605397455080,"sku":"SUC-G7-UK","price":299.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47605397487848,"sku":"SUC-G7-DE","price":299.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47605397520616,"sku":"SUC-G7-AU","price":299.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":47605397553384,"sku":"SUC-G7","price":349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/00_6b6db0b8-fa54-4436-9dca-32700ec1bd79.jpg?v=1755499396"},{"product_id":"nobsound-p10-pro-portable-tube-headphone-amplifier","title":"Nobsound P10 PRO HiFi Portable Tube Headphone Amplifier","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-start=\"78\" data-end=\"127\"\u003e\u003cspan\u003ePortable HiFi Sound: Driven by batteries, P10-PRO features Raytheon JAN6418 direct-heating tubes to deliver rich, warm tube sound. Whether you’re traveling, commuting, or relaxing at home, it pairs effortlessly with your phone, laptop, computers etc. and provides exceptional headphone performance anytime, anywhere.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-start=\"476\" data-end=\"512\"\u003e\u003cspan\u003eWorry-Free Battery Life: Enjoy up to\u003cstrong\u003e \u003c\/strong\u003e8-10 hours of uninterrupted music with two\u003cstrong\u003e \u003c\/strong\u003e600mAh lithium batteries. The P10-PRO supports USB-C charging, allowing you to recharge while listening. When powered off, it fully recharges in just 2.5-3 hours. With the replaceable battery design, you have the option to swap batteries for extended use.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-start=\"1511\" data-end=\"1570\"\u003e\u003cspan\u003eCustomizable Tubes \u0026amp; Op-Amps: Unlock the true potential of P10-PRO with swappable tubes and op-amps. Start with the original JAN6418 tubes and NE5532 op-amp, then explore upgrades for more possibilities. Enjoy a personalized audiophile experience tailored to your tastes.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-start=\"1511\" data-end=\"1570\"\u003e\u003cspan\u003eVisible Top Window: Admire the mesmerizing glow of the JAN6418 tubes through the top window. See the tubes and op-amps in action, adding a touch of style to your audio setup. It not only enhances the aesthetic appeal but also offers insight into the components that shape your premium audio experience.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-start=\"1511\" data-end=\"1570\"\u003e\u003cspan\u003eBuilt for Durability and Convenience: Equipped with WIMA capacitors and a CNC-machined aluminum chassis, the P10-PRO is built to last. Also comes with clear battery status and thoughtful accessories including cables, rubber bands, and a screwdriver—ready for quick setup and hassle-free operation.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: Why does the P10 make a noise when powered on\u003c\/strong\u003e\u003cstrong\u003e\/off\u003c\/strong\u003e\u003cstrong\u003e or \u003c\/strong\u003e\u003cstrong\u003eshocke\u003c\/strong\u003e\u003cstrong\u003ed?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eA:\u003c\/strong\u003e JAN6418 are directly heated tubes. During power-on\/off or physical shock\/tap\/vibration, a \"wing~~~\" noise may occur for 25-35 seconds, which is normal and will fade as the tube stabilizes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: What kind of charger should I use?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Please use a standard 5V DC power supply. Avoid fast chargers to prevent damage.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: Can I replace the batteries with different brands or models?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No. Always use two batteries of the same brand, model, and capacity to avoid malfunctions or safety risks.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: \u003c\/strong\u003e\u003cstrong\u003eIs there a temperature requirement for use?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eA:\u003c\/strong\u003e 8°C to 50°C (46°F to 122°F). Avoid extreme temperatures to ensure proper charging and performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: \u003c\/strong\u003e\u003cstrong\u003eI\u003c\/strong\u003e\u003cstrong\u003ef I won’t use the P10 for a while\u003c\/strong\u003e\u003cstrong\u003e, should I remove the batteries?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: \u003c\/strong\u003e\u003cstrong\u003eCan I replace the tubes\u003c\/strong\u003e\u003cstrong\u003e?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. The default Raytheon JAN6418 tubes can be replaced with CK6418 or CK548DX. Remove glue from the pins before replacement.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: Can I upgrade the op-amp?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. The default NE5532 can be upgraded to dual op-amps like JRC4558, JRC4556, OPA2604, OPA2111, or MUSES02.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Nobsound\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: P10-PRO\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio input: 3.5mm AUX\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio output: 3.5mm headphone jack\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutput power: 170mW@32Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency response: 20Hz-20KHz  \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTHD: \u0026lt;0.1%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSNR: 75dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eGain: 12dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax. input level: 1.0Vrms\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax. output level: 2.5Vrms\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eMatched headphone impedance: 16-200Ω\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWorking mode: Vacuum tube + Op-amp hybrid\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePower supply: 2 × 14500 Li-ion batteries (3.7V, 600mAh each, total 1200mAh)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBattery life: 8–10 hours (varies with volume level used)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBattery indicator display: 5-level (0% \/ 25% \/ 50% \/ 75% \/ 100%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWorking temperature: 8-50℃\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput voltage: DC 5V\/≥1A\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W*D*H): 120*75*18mm \/ 4.72*2.95*0.71in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage dimensions (W*D*H): 195*120*65mm \/ 7.68*4.72*2.56in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet weight: 252g \/ 0.55lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage weight: 400g \/ 0.88lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking list\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* P10-PRO Headphone Amp\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* 3.5mm Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Type-C Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2* Rubber Band\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Screwdriver\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":47612155789544,"sku":"XX-P10-PRO-US","price":109.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47612155822312,"sku":"XX-P10-PRO-UK","price":109.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47612155855080,"sku":"XX-P10-PRO-DE","price":109.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47612155887848,"sku":"XX-P10-PRO-AU","price":109.99,"currency_code":"USD","in_stock":true},{"title":"Other","offer_id":47612155920616,"sku":"XX-P10-PRO","price":109.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/10_3a854944-2eaf-43a8-a986-1876406a1b4e.jpg?v=1755679321"},{"product_id":"nobsound-m10-mini-bluetooth-5-4-digital-amplifier","title":"Nobsound M10 Mini TPA3255 Digital Amplifier with Bluetooth\/USB Input","description":"\u003cp\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-end=\"486\" data-start=\"225\"\u003e\u003cspan\u003eMultiple Inputs for Versatile Use: With Bluetooth 5.4, USB, and AUX inputs, seamlessly connect any source such as phones, tablets, TVs, CD players etc. Enjoy plug-and-play audio with USB-C input from your PC or laptop, no driver needed.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"486\" data-start=\"225\"\u003e\n\u003cspan\u003eHiFi Audio in a Compact Body: Adopting the TPA3255 chip, \u003c\/span\u003e\u003cspan\u003eM10 delivers max. 300W×2 power. Despite its ultra-compact size, it drives 4–8Ω speakers effortlessly and fits neatly into any desktop, home theater, or shelf system.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"737\" data-start=\"488\"\u003e\n\u003cspan\u003eNext-Gen Bluetooth 5.4 Streaming: \u003c\/span\u003e\u003cspan\u003eEquipped with QCC3084 chip, the M10 supports aptX-HD, aptX-Lossless, and LDAC for Hi-Res wireless audio. Enjoy stable, low-latency music streaming with easy Bluetooth reset function.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"1259\" data-start=\"994\"\u003e\n\u003cspan\u003eTailored Audio with Clear Status Lights: \u003c\/span\u003e\u003cspan\u003eFine-tune your music with dedicated treble and bass knobs. Real-time indicators clearly show input mode and power status. Thoughtfully designed for intuitive use whether you’re gaming, working, or relaxing.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"1526\" data-start=\"1261\"\u003e\n\u003cspan\u003eDesigned for Seamless Daily Use: \u003c\/span\u003e\u003cspan\u003eM10 features wide 19–48V DC input, and multiple built-in protection circuits. With its sleek metal chassis, smart functions, and powerful performance, it’s perfect for home stereo upgrades.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003cdiv\u003e\u003cspan\u003eFAQ\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003eQ: Why does the M10 shut down automatically during use?\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: M10 requires a power supply with at least 100W output. Auto shut-off usually means your speaker demands more power. Please reduce the volume or use a higher-wattage power adapter. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eQ: Is the included power adapter sufficient?\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: The 32V\/5A adapter (if included in your purchase) is sufficient for most home speakers. If you purchased the version without a power supply or need higher output, please use a high-quality adapter with adequate power.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eQ: How do I switch between AUX, Bluetooth, and USB inputs?\u003cbr\u003eA: When powered on, the M10 defaults to Bluetooth input. Input priority: AUX \u0026gt; Bluetooth \u0026gt; USB.\u003cbr\u003e– AUX takes priority when connected.\u003cbr\u003e– To use Bluetooth, disconnect the AUX cable.\u003cbr\u003e– To use USB, disconnect AUX and pause Bluetooth playback.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eQ: Which systems support USB input on the M10?\u003cbr\u003eA: USB input works only with Windows computers (Windows 7 to 11, no driver needed, plug and play). It does not support phones, Macs, or other OTG devices.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eQ: Why doesn’t the Play\/Pause button work in AUX \/ USB mode?\u003cbr\u003eA: The Play\/Pause function only controls Bluetooth playback. For AUX \/ USB mode, please control playback from your source device.  \u003c\/p\u003e\n\u003cp\u003eQ: Can I replace the NE5532 op-amps?\u003cbr\u003eA: No, the NE5532 op-amps are surface-mounted and not replaceable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eParameters\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eBrand: Nobsound\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eModel: M10\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eAudio input: Bluetooth 5.4 \/ USB-C \/ 3.5mm AUX\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eAudio output: Banana speaker jacks\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eChipset: \u003c\/span\u003e\u003cspan\u003eQCC3084 + TPA3255 + NE5532\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax. output power: 300W*2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBluetooth version: 5.4\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBluetooth supported codecs: SBC\/AAC\/LC3\/aptX\/aptX-HD\/aptX-Adaptive\/aptX-Lossless\/LDAC\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eMax sampling rate (USB\/Bluetooth): 24-bit \/ 96kHz  \u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency response: 30Hz-20KHz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSNR: ≥96dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eMatched speaker impedance: 4-8Ω\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eWorking voltage: DC 19-48V (5.5*2.5mm)\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eDimensions (W*D*H): 78*124*23mm \/ 3.07*4.88*0.91in\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003ePackage dimensions (W*D*H): 210*165*60mm \/ 8.26*6.49*2.36in\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eNet weight: 218g \/ 0.48lb\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage weight (without power adapter): 400g \/ 0.88lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage weight (with power adapter): 1.0kg \/ 2.20lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cdiv\u003e\n\u003cspan\u003ePacking List\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003e1 × M10 Amp\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e1 × DC 32V\/5A Power Adapter \u003cstrong\u003e(Optional)\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1 × USB Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1 × User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US \/ With DC 32V Power Adapter","offer_id":47614052532456,"sku":"DZ109-32V-US","price":89.99,"currency_code":"USD","in_stock":true},{"title":"US \/ Without Power Adapter","offer_id":47614052565224,"sku":"DZ109-DJ-US","price":56.99,"currency_code":"USD","in_stock":true},{"title":"UK \/ With DC 32V Power Adapter","offer_id":47614052597992,"sku":"DZ109-32V-UK","price":89.99,"currency_code":"USD","in_stock":true},{"title":"UK \/ Without Power Adapter","offer_id":47614052630760,"sku":"DZ109-DJ-UK","price":56.99,"currency_code":"USD","in_stock":true},{"title":"EU \/ With DC 32V Power Adapter","offer_id":47614052663528,"sku":"DZ109-32V-DE","price":89.99,"currency_code":"USD","in_stock":true},{"title":"EU \/ Without Power Adapter","offer_id":47614052696296,"sku":"DZ109-DJ-DE","price":56.99,"currency_code":"USD","in_stock":true},{"title":"AU \/ With DC 32V Power Adapter","offer_id":47614052729064,"sku":"DZ109-32V-AU","price":89.99,"currency_code":"USD","in_stock":true},{"title":"AU \/ Without Power Adapter","offer_id":47614052761832,"sku":"DZ109-DJ-AU","price":56.99,"currency_code":"USD","in_stock":true},{"title":"Other \/ With DC 32V Power Adapter","offer_id":47614052794600,"sku":"DZ109-32V","price":89.99,"currency_code":"USD","in_stock":true},{"title":"Other \/ Without Power Adapter","offer_id":47614052827368,"sku":"DZ109-DJ","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_adfbcc67-5e94-4407-ac8e-534ea93421d9.jpg?v=1761197594"},{"product_id":"usb-to-spdif-converter-xmos-xu316-coaxial-optical-toslink-ddc-digital-interface","title":"Douk Audio U2 Digital Interface DDC with XMOS XU316 USB to SPDIF Converter","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eLossless USB to S\/PDIF Converter: Convert USB signals from PC, laptops, phones, tablets, and Raspberry Pi etc. to optical\/coaxial outputs simultaneously with zero loss and no latency. Ideal for DACs, digital amplifiers, or home theater systems that only support S\/PDIF input.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eXMOS XU316 Chipset for Hi-Res Audio: U2 supports up to 24bit\/192kHz PCM and DSD64 (DOP) playback. Enjoy lower jitter, cleaner signals, and rich audio detail—perfect for high-end music systems and audiophiles. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003ePlug-and-Play Simplicity: No driver needed for PCM playback on Windows 10+ and macOS. Includes a dual-head Type-A\/Type-C to Type-C cable for easy connection, fully OTG-ready for phones and instantly usable. \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eReal-Time Format Indicators:\u003c\/span\u003e\u003cspan\u003e The built-in sampling rate indicator clearly displays PCM\/DSD status and sampling rate, letting you instantly verify your audio format for accurate, bit-perfect playback and peace of mind.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCompact Design for Seamless Integration: Despite its powerful digital processing, the U2 features a lightweight and space-saving design. Ideal for HiFi desktop audio systems where space and performance both matter.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eSystem Driver Requirements\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eFor Windows 10 and Above: Driver-free for PCM; Requires driver for DSD \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eFor MacOS: Driver-free\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eFor Win 7\/8: Requires driver for PCM\/DSD\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eFor Android: Driver-free\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eFor iOS: Driver-free\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eFor Linux: Driver-free \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eWarm tips\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e1.The U2 supports OTG and comes with an OTG-compatible USB cable for direct connection to OTG-enabled phones. For iPhones or iPads with a Lightning port, a high-current camera kit is required. Newer models with a Type-C port can use the included cable directly. \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e2.The U2 only supports 2.0 channel stereo audio. Multichannel formats such as 5.1, 7.1, or Dolby formats are not supported. \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e3.Please install the required driver and files from the included USB drive, and follow the instructions or video guide to set up your player properly.  \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eParameters\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: U2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio input: USB Type-C\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio output: Coaxial\/Optical\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUSB chip: XMOS XU316\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax. sampling rate supported:\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003ePCM：44.1kHz-192kHz\/16Bit-24Bit\u003c\/div\u003e\n\u003cdiv\u003eDSD：DOP DSD64\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eOperation systems PC-USB supported:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003eW10\/W11\/Mac OS\/Android\/iOS\u003c\/div\u003e\n\u003cdiv\u003eWin7\/Win8\/Linux (Cannot guarantee 100% compatible)\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eTHD+N: 0.000008%\u003c\/li\u003e\n\u003cli\u003eWorking voltage: DC 5V\u003c\/li\u003e\n\u003cli\u003eDimensions (W*D*H): 40*52*20mm \/ 1.57*2.05*0.79in\u003c\/li\u003e\n\u003cli\u003ePackage dimensions (W*D*H): 170*120*50mm \/ 6.69*4.72*1.97in\u003c\/li\u003e\n\u003cli\u003eNet weight: 45g \/ 0.1lb\u003c\/li\u003e\n\u003cli\u003ePackage weight: 170g \/ 0.37lb\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking list\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* U2 Digital Interface\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Optical Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* USB-C to USB-A\/USB-C Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":47632503963880,"sku":"SUC-U2-US","price":56.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47632503996648,"sku":"SUC-U2-UK","price":56.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47632504029416,"sku":"SUC-U2-DE","price":56.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47632504062184,"sku":"SUC-U2-AU","price":56.99,"currency_code":"USD","in_stock":true},{"title":"Other","offer_id":47632504094952,"sku":"SUC-U2","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_1_704745f1-09c9-46a3-9678-2a92b18817cc.jpg?v=1756342686"},{"product_id":"douk-audio-m08e-mini-fm-radio-tuner-64-108mhz-stereo-receiver-preamp-headphone-amp-w-treble-bass","title":"Douk Audio M08E Mini FM Radio Tuner Preamp Headphone Amplifier","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eAll-in-One FM Tuner: Enjoy the convenience of an FM tuner, preamp, and headphone amplifier all in one device. Streamline your setup, enjoy crystal-clear FM broadcasts, and adapt seamlessly to preamp or headphone mode to fit your audio needs.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eGlobal FM Compatibility: With the American SI4831 radio chip, it supports three selectable frequency ranges:\u003cstrong\u003e \u003c\/strong\u003e64-87MHz, 76-90MHz, 87-108MHz, offering global compatibility. Enjoy easy, one-touch frequency switching for seamless reception.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFlexible Preamp \u0026amp; Headphone out: With AUX input, it seamlessly connects to CD players, phones, and laptops etc., use it as a preamp for your power amp \/ active speakers, or enjoy private listening through the TPA6132 chip, offering dynamic sound with minimal noise.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eShape Your Ideal Sound: With dedicated bass and treble knobs, you can easily tailor your audio to perfection. Enhanced by dual NE5532 op-amps and precision components, the M08E delivers rich and detailed audio.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eMini Size, Built to Last: Compact yet durable, the M08E features a solid aluminum alloy body that ensures long-term reliability. With mute\/unmute, clear status indicators, and intuitive controls, it delivers everyday convenience for any audio system.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cspan\u003eQ: Why is the FM signal weak?\u003c\/span\u003e\u003cbr data-end=\"363\" data-start=\"360\"\u003e\u003cspan\u003eA: Poor FM reception may be caused by interference or location. Please keep the M08E away from potential sources of electromagnetic interference and place it near window or in an open area for better signal.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cspan\u003eQ: How to improve FM tuning and reception?\u003c\/span\u003e\u003cbr data-end=\"764\" data-start=\"761\"\u003e\u003cspan\u003eA: Please adjust the antenna’s position patiently to find the strongest signal, and try placing it in different locations to optimize reception.  \u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: What is the default mode when powered on? How to switch to AUX?\u003cbr data-end=\"215\" data-start=\"212\"\u003eA: M08E defaults to FM mode. When an AUX cable is plugged in, it automatically switches to AUX input mode.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Does M08E support auto search and station memory?\u003cbr data-end=\"969\" data-start=\"966\"\u003eA: No. M08E only supports manual tuning.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Are the NE5532 op-amps pluggable?\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong\u003eA: \u003c\/strong\u003eNo. They are soldered directly onto the board and cannot be replaced or swapped out.\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Nobsound\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: M08E\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio input: FM \/ 3.5mm AUX\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio output: 3.5mm AUX\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFM frequency: 64-87MHz \/ 76-90MHz \/ 87-108MHz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHeadphone matched impedance: 16-32Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTone control: Treble \u0026amp; Bass\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput voltage: DC 12-20V\/≥100mA (5.5*2.1 \/ 5.5*2.5mm)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W*D*H): 77*62*40mm \/ 3.03*2.44*1.57in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage dimensions (W*D*H): 210*165*60mm \/ 8.26*6.49*2.36in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet weight: 90g \/ 0.198lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage weight: 500g \/ 1.10lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* M08E Radio Tuner\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e1* Antenna\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* DC 12V Power Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* 3.5mm to RCA Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* 3.5mm Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":47632955900136,"sku":"DZ110-US","price":39.99,"currency_code":"USD","in_stock":false},{"title":"UK","offer_id":47632955932904,"sku":"DZ110-UK","price":39.99,"currency_code":"USD","in_stock":false},{"title":"EU","offer_id":47632955965672,"sku":"DZ110-DE","price":39.99,"currency_code":"USD","in_stock":false},{"title":"AU","offer_id":47632955998440,"sku":"DZ110-AU","price":39.99,"currency_code":"USD","in_stock":false},{"title":"Other","offer_id":47632956031208,"sku":"DZ110","price":39.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/2_440bd7d0-ad9f-41c6-96db-ed1a3cf1ddeb.jpg?v=1756349542"},{"product_id":"douk-audio-q100-ak4499-ak4191-fully-balanced-desktop-dac-dsd512","title":"Douk Audio Q100 AK4499+AK4191 Fully Balanced Desktop DAC DSD512","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFlagship DAC for Audiophiles: Featuring the premium AK4499EX + AK4191 DAC chips, aided by XU316 and QCC5125, Q100 unlocks high-resolution music in stunning detail. Supports up to PCM 768kHz\/32bit and DSD512 for an uncompromised listening experience.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eVersatile Inputs for Any Digital Source: Supports USB-C, AES, Optical, Coaxial, and Bluetooth 5.1 with LDAC, aptX-HD support. Whether you’re connecting a PC, music streamer, CD player, TV, or phone, Q100 adapts to your audio setup with unmatched clarity and compatibility.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBalanced Output for Pure HiFi Sound: Offers both balanced XLR and single-ended RCA outputs, ensuring precise stereo imaging and dynamic performance. Enjoy every detail with SNR≥124dB and THD+N at 0.0002%, built for demanding audiophiles seeking ultra-transparent sound.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eUAC Switch for Ultimate Flexibility: Enjoy broad USB compatibility. UAC1.0 ensures plug-and-play with PS5, Switch, and legacy systems; UAC2.0 unlocks high-res playback for uncompromised audio. Ideal for gaming, music, and professional use.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eUser-Centric Design with Smart Controls: Includes diverse filter modes to fine-tune sound texture and detail, 12V trigger for synchronized power on\/off, OLED screen displaying real-time status, Bluetooth reset and full remote control. A truly refined desktop DAC with thoughtful usability.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Which systems require driver installation?\u003cbr\u003eA: UAC1.0: Driver-free on all systems.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e     UAC2.0: Windows 7\/8 require drivers. Windows 10\/11 are driver-free for PCM, but need drivers for DSD. MacOS and Linux are driver-free.  \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Q100 can't work with my phone via USB, is a driver required?\u003cbr\u003eA: No, it's drive-free. Please use the supplied OTG-compatible USB cable and ensure the phone support OTG. On some phones, you may need to enable OTG in settings. For iPhones\/iPads with a Lightning port, a high-current camera kit is required.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eQ: Do the XLR and RCA outputs work simultaneously, and is the volume synchronized?\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: Yes, both outputs work at the same time, with volume control applied to both simultaneously.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: What op-amps are used, and can they be replaced?\u003cbr data-end=\"86\" data-start=\"83\"\u003eA: The Q100 uses five OPA1612 surface-mount op-amps, which are soldered directly onto the board and cannot be replaced or swapped out. \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Which functions can only be controlled via the remote control?\u003cbr data-end=\"1206\" data-start=\"1203\"\u003eA: Only clearing Bluetooth pairing and UAC1.0\/2.0 switching must require the remote; all other functions can be operated from the panel.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003eQ: Does switching UAC mode require restarting the Q100?\u003c\/div\u003e\n\u003cdiv\u003eA:\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eUsually no restart is required. For a small number of computers the USB cable may need to be reconnected.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Does the remote control come with batteries?\u003cbr\u003eA: For safer and faster delivery, the remote control may not include batteries (AAA*2). Please prepare batteries yourself.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: Q100\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio input: Bluetooth 5.1\/USB-C\/Coaxial\/Optical\/AES\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio output: XLR\/RCA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eChipset: AK4499+AK4191+QCC5125+XU316+OPA1612\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBluetooth supported codecs: SBC\/AAC\/aptX\/aptX-HD\/LDAC\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eMax sampling rate supported:\u003cbr\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eUSB input: PCM 768kHz\/32bit, DSD512 (native), DSD256 (DoP)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCoaxial\/Optical input: PCM 192kHz\/24bit, DSD64 (DoP)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAES input: 192kHz\/24bit\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency response: 20Hz-20KHz (±0.1dB)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSNR: ≥124dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTHD+N: 0.0002%@1kHz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eMax output level: RCA:2.3V; XLR:4.5V\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUSB compatible operating systems: Windows 7\/8\/10\/11, macOS, Linux, Android, iOS \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eFilter modes: \u003c\/span\u003e\u003cspan\u003ePCM:6 modes, \u003c\/span\u003e\u003cspan\u003eDSD:2 modes\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBrightness of display screen: 10-100%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eScreen display time: 15s\/30s\/solid on\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWorking voltage: Adaptive AC 100-130V \/ 200-240V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W*D*H): 228*170*46mm \/ 8.98*6.69*1.81in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage dimensions (W*D*H): 400*230*80mm \/ 15.74*9.05*3.15in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet weight: 1.73kg \/ 3.81lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage weight: 3.0kg \/ 6.611b\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* Q100 DAC\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Bluetooth Antenna\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Remote Control\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Power Cord\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* USB-A\/C to USB-C Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Optical Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":47679411486952,"sku":"SUC-Q100-US","price":499.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47679411519720,"sku":"SUC-Q100-UK","price":549.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47679411552488,"sku":"SUC-Q100-DE","price":499.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47679411585256,"sku":"SUC-Q100-AU","price":549.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":47679411618024,"sku":"SUC-Q100","price":549.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_ad01d96f-c045-4acf-bd3f-2b8fc2dd8241.jpg?v=1757923630"},{"product_id":"ampapa-d1-hifi-bluetooth-amplifier-with-digital-vu-meters-hpf","title":"Ampapa D1 HIFI TPA3255 Amplifier with Digital VU Meter","description":"\u003cdiv\u003e\n\u003cspan\u003eFeatures\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eAmpapa × Douk Audio Collaboration: Built on the acclaimed Douk Audio A5 amp, the D1 retains core features like TPA3255 chip, HPF, PRE-OUT, socketed op-amps—now upgraded with digital VU display, TRS balanced input, Bluetooth 5.2, treble\/bass control, remote and more for next-gen HiFi performance.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eDigital VU Meters with Retro Soul: D1 features a vibrant OLED screen that merges classic aesthetics with modern utility. Enjoy 7 VU styles in classic yellow, blue, or black and view real-time feedback of all operations and playback. Both stylish and functional, it brings your music to life.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eEngineered for True 2.1 Systems: The adjustable 30–200Hz high-pass filter removes low frequencies from the main output, letting your stereo speakers focus on mids and highs with better clarity, while PRE-OUT offers full-range signal to active subwoofers, amplifiers, or active speakers.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePremium Components for Superior Fidelity: Pluggable NE5532 op-amps allow for effortless upgrades through the top glass panel for long-term flexibility. From NJW1194 chip, SAGAMI inductors, 2oz copper PCB to GaN 48V\/5A power adapter, every element is chosen for sonic purity. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eEngineered for Everyday Convenience: With a 12V trigger, infrared remote, one-touch mute and Bluetooth reset, D1 simplifies your daily audio setup. Fine-tune your sound with ±10dB tone control, while internal RGB lighting adds a refined, modern glow. Enjoy seamless operation from start to finish.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Can I replace the op-amps in the D1？\u003cbr\u003eA:Yes, the D1 uses 2PCs pluggable NE5532 op-amps,which can be replaced by normal dual op-amps like 2604\/2134\/muses02 etc. Before replacing, please turn off the power, ensure correct orientation, and power ononly after confirming proper installation.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Why don't the single VU meter and spectrum display work properly?\u003cbr\u003eA: In dual VU meter mode, both meters show the audio levels for the left and right channels separately.In single VU meter and spectrum modes, the D1 only detects the left channel input. If only the right channel is connected, the VU meter and spectrum display will not operate.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Does the high-pass filter affect the Pre-Out signal?\u003cbr\u003eA:No,the high-passfilteronly applies to the speaker output. The Pre-Out delivers a full-range signal.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Are the Pre-Out's volume and tone controls synchronized with the speaker output?\u003cbr\u003eA: Yes.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Is it normal for the D1 to become hot during operation?\u003cbr\u003eA: The D1's TPA3255 amp chip dissipates heat through contact with the chassis. It is normal for the chassis to heat up during operation. This does not affect performance or lifespan of the D1. Please place the D1 in a well-ventilated area,and avoid stacking devices or blocking ventilation.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eQ: What should I use the 12V trigger input for?\u003cbr\u003eA: The 12V trigger input is designed for use with preamps or DACs that have a trigger output to achieve synchronous power on and off. Please do not use this port as an audio input or connect it to a power supply, as this could damage the D1.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: What is the required power supply for the D1?\u003cbr\u003eA:The D1 requires a DC 24-48V (≥4A) input voltage. Please use the supplied power adapter for optimal performance. lf using a third-party power supply,ensure it meets the required voltage and current specifications.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Why doesn't the remote control include batteries?\u003cbr\u003eA:For safer and faster delivery, the remote control may not include batteries (AAA*2). Please prepare them yourself.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Ampapa\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: D1\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio input: RCA\/TRS\/Bluetooth 5.2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio output: Banana speaker jacks \/ Pre-Out\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax. output power: 300W*2 (4Ω）\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTHD+N: 0.002%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSNR: ≥114dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency response: 20Hz-20KHz (±0.4dB)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHigh-pass filter frequency range: 30Hz-200Hz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHigh-pass fiter roll-off: 12dB per octave\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBluetooth chip: QCC304X\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBluetooth supported codecs: SBC\/AAC\/aptX\/aptX-HD\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput sensitivity: RCA: 2V  TRS: 4V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePre-out rated output level: 3.5V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMatched speaker impedance: 4-8Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTreble\/bass range: ±10dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput voltage: DC 24-48V\/ ≥4A (5.5*2.5mm)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W*D*H): 155*124*42mm \/ 6.10*4.88*1.65in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage dimensions (W*D*H): 268*192*95mm \/ 10.55*7.56*3.74in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet weight: 742g \/ 1.64lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003ePackage weight: 1.73kg \/ 3.81lb\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePower Output Table of the D1\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003ctable border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003ePower Supply\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSpeaker Impedance\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eOutput Power\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"3\"\u003e\u003cspan\u003e48V\/5A\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4Ω\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e120W+120W\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e6Ω\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e110W+110W\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e8Ω\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e102W+102W\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* D1 Amp\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* DC 48V5A GaN Power Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Remote Control\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Bluetooth Antenna\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Cleaning Cloth\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Certificate\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e1* Warranty\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":47672444551400,"sku":"SUC-D1-US","price":199.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47672444584168,"sku":"SUC-D1-UK","price":199.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47672444616936,"sku":"SUC-D1-DE","price":199.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47672444649704,"sku":"SUC-D1-AU","price":199.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":47672444682472,"sku":"SUC-D1","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_89339c36-f90f-499f-90b7-0be0d92e6ffc.jpg?v=1757470299"},{"product_id":"douk-audio-vu9mini-rgb-led-tube-sound-level-meter-music-spectrum-display","title":"Douk Audio VU9MINI RGB LED Tube Sound Level Meter Music Spectrum Display","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eVU9 MINI Music Visualizer: Transform your desktop into a vibrant soundscape. With a built-in microphone, VU9 MINI captures real-time music and turns every beat into immersive lighting effects, offering dynamic visual feedback.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRetro Nixie Tube Style: VU9 MINI draws inspiration from vintage nixie tubes, echoing their iconic glowing columns in a sleek, modern form. The magnetic tube design ensures effortless installation while adding a touch of retro-futuristic charm. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eTotal Control Over Your Ambiance: Fine-tune your lighting with 8 dynamic display modes, full-color presets, adjustable brightness, speed, and gain. Whether for relaxing evenings or energetic parties, VU9 MINI adapts effortlessly to every mood and music style. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eElevate Your Sensory Experience: Perfect for your HiFi system, gaming monitor, or living room, the VU9 MINI syncs with every beat to enhance music and movies. It adds an immersive layer of light that brings your audio to life and deepens your enjoyment. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eThe Perfect Gift for Any Occasion: Powered by USB-C for plug-and-play ease, VU9 MINI is a great gift for music lovers and tech fans alike. Ideal for birthdays, holidays, or desk decor, it brings personality and atmosphere to any personal space, office, or home.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eQ: Does the VU9 MINI come with a power adapter? What are the power requirements?\u003cbr\u003eA: No, the power adapter is not included. Please use a USB power adapter with DC 5V (≥1A). Insufficient current may cause the VU9 MINI not to work properly and voltage over 5V may damage the VU9 MINI.\u003cbr\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: How do I install the tubes on the VU9 MINI?  \u003cbr\u003eA: Make sure the side with LED beads is on the same side as the knob panel. Align the two tubes with the slots and insert them carefully. The tubes are magnetically attached, no screws required.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: How to turn the bottom LED light on or off?\u003cbr\u003eA: Single click the right knob to enter brightness mode, and then long press the right knob for 3 seconds, then you can turn on or off the LED light.\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Why does the light column display even when there is no music input or low noise?\u003cbr\u003eA: This is due to high input sensitivity. Simply turn down the GAIN knob to reduce the sensitivity.\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: How to reset to factory mode?\u003cbr\u003eA: In the display mode (LED light on), long press the knob on the right for 2s.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: VU9 MINI\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio input: Microphone pick-up \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTube mounting method: Magnetic attachment \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDisplay mode: 8 kinds\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eLevel meter \u003c\/span\u003e\u003cspan\u003edisplay mode: 2.5x RMS signal compression\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNumber of LED beads: 55pcs\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBrightness adjustment: 10 levels \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePower-off saving settings: Supported \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRhythm sensitivity setting: Supported\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eColor setting: Support full-color\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWorking voltage: DC 5V≥1A (Type-C)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W*D*H): 85*85*145mm \/ 3.35*3.35*5.71in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage dimensions (W*D*H): 250*180*90mm \/ 9.84*7.08*3.54in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet weight: 167g \/ 0.371b \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage weight: 400g \/ 0.88lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* VU9 MINI\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2* Tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Type-C Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1 Set* Isolation Stand Feet\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":47731629326568,"sku":"XX-VU9-MINI-US","price":59.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47731629359336,"sku":"XX-VU9-MINI-UK","price":59.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47731629392104,"sku":"XX-VU9-MINI-DE","price":59.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47731629424872,"sku":"XX-VU9-MINI-AU","price":59.99,"currency_code":"USD","in_stock":true},{"title":"Other","offer_id":47731629457640,"sku":"XX-VU9-MINI","price":59.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_9fd74a8f-35cd-4e0a-9a17-d4153f6b7a9a.jpg?v=1759986728"},{"product_id":"douk-audio-vu360-retro-analog-vu-meter-music-spectrum-for-home-office-gift","title":"Douk Audio VU360 Special Analog VU Meter Music Spectrum Visualizer","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eExclusive Analog VU Meter: Featuring an oversized visual display with unique dual-needle, the VU360 is expertly crafted to offer exceptional clarity and vivid detail. Blending retro charm with modern tech, it adds a captivating focal point to any desk or living space.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eDual Inputs for Ultimate Convenience: Provides both a sensitive built-in microphone for wire-free convenience and line input for a direct connection to your audio source. Works flexibly in any scenario, instantly transforming game audio, music, and movies into a dynamic show. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRich Colors to Match Your Setup: The Yellow version offers 4 color families (red, orange, yellow, green), each with 5 colors, and the White version has broader 7 color families (red, orange, yellow, green, cyan, blue, purple), each with 2-3 colors. Choose the perfect match for your style and ambiance.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePrecision Control for Perfect Sync: Fine-tune your visual experience with intuitive controls. Effortlessly adjust color, brightness, gain, and sensitivity, creating the ideal atmosphere for your audio, from quiet ambient tracks to explosive gaming soundscapes.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRefined Gift for Every Occasion: Housed in a sturdy metal casing for a premium feel, the VU360 comes in an exquisite gift box, making it an ideal present for music enthusiasts, gamers, or lovers of stylish, retro-inspired decor. Perfect for Birthdays, Christmas, Valentine's Day, and more.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: What's the difference between the two versions of the VU360?\u003cbr\u003eA: Please note: The VU360 is a visualizer, not a speaker, and does not play music. The yellow version supports 4 color families, each offering 5 adjustable color variations. The white version covers 7 color families with 2 to 3 color variations available for each.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: What kind of power supply should I prepare?\u003cbr\u003eA: Please use a DC 5V power supply with at least 1A output. Higher voltage may cause damage, while insufficient current may affect performance.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eQ: Can I track my sensitivity or gain adjustments?\u003c\/span\u003e\u003cbr data-start=\"98\" data-end=\"101\"\u003e\u003cspan\u003eA: Yes, the indicator lights can show your progress: The left light stays solid at the minimum value. As you increase the value, the lights light up sequentially. When all three lights are solid, it indicates the maximum level.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Why do the left and right needles respond differently?\u003cbr\u003eA: The inconsistency in the left and right needles is a normal phenomenon caused by differences in the stereo balance of different songs. It does not indicate a malfunction of the VU360.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eQ: Why is the VU360 meter needle barely moving when connected to a turntable?\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: The turntable's output signal is typically too weak and requires amplification via a phono preamp. The VU360 is designed for standard line-level signals, such as those from CD players, computers, or phones.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: VU360\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVU meter version: Yellow \/ White (Optional) \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio input: 3.5mm AUX \/ Microphone pickup\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio output: 3.5mm AUX\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNumber of channels: 2.0\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBacklight color: Single-color \/ Multi-color\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBrightness adjustment: 8-level\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eGain adjustment: Supported\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSensitivity adjustment: Supported\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVU meter diameter: 75mm \/ 2.95in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput voltage: DC 5V \/ ≥1A\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePower interface: USB-C\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W*D*H): 105*105*70mm \/ 4.13*4.13*2.76in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage dimensions (W*D*H): 204*153*102mm \/ 8.03*6.02*4.01in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet weight: 618g \/ 1.36lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage weight: 1.0kg \/ 1.10lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* VU360\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Type-C Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"Yellow \/ US","offer_id":47743725994216,"sku":"SUC-VU360-Y-US","price":99.99,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ UK","offer_id":47743726026984,"sku":"SUC-VU360-Y-UK","price":99.99,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ EU","offer_id":47743726059752,"sku":"SUC-VU360-Y-DE","price":99.99,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ AU","offer_id":47743726092520,"sku":"SUC-VU360-Y-AU","price":99.99,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ China","offer_id":47743726125288,"sku":"SUC-VU360-Y","price":99.99,"currency_code":"USD","in_stock":true},{"title":"White \/ US","offer_id":47747888087272,"sku":"SUC-VU360-W-US","price":99.99,"currency_code":"USD","in_stock":true},{"title":"White \/ UK","offer_id":47747888120040,"sku":"SUC-VU360-W-UK","price":99.99,"currency_code":"USD","in_stock":true},{"title":"White \/ EU","offer_id":47747888152808,"sku":"SUC-VU360-W-DE","price":99.99,"currency_code":"USD","in_stock":true},{"title":"White \/ AU","offer_id":47747888185576,"sku":"SUC-VU360-W-AU","price":99.99,"currency_code":"USD","in_stock":true},{"title":"White \/ China","offer_id":47747888218344,"sku":"SUC-VU360-W","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_74ecd132-66b5-4972-a0ff-62951bb71044.jpg?v=1760577236"},{"product_id":"nobsound-p10-mini-hifi-audio-stereo-headphone-amplifier","title":"Nobsound P10 Mini Headphone Amplifier HiFi Stereo Preamp","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003ePowerful Output for All Headphones:\u003cstrong data-end=\"271\" data-start=\"230\"\u003e \u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003eDelivers up to 1100mW@32Ω output to drive 24–600Ω headsets with ease. Ideal for both sensitive IEMs and demanding over-ears, ensuring clear, rich, and dynamic audio performance.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFlexible I\/O for Wide Compatibility: Supports stereo RCA and 3.5mm AUX inputs, plus 6.35mm and 3.5mm headphone outputs. Easily connect DACs, PCs, phones, CD players. The 3.5mm output can also serve as a preamp output for amplifiers or active speakers.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eHigh-Voltage Circuit for Purer Sound:\u003c\/span\u003e\u003cstrong data-end=\"653\" data-start=\"610\"\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003eBuilt-in 30V voltage boost enhances headroom, reduces distortion, and improves dynamics. Enjoy purer sound with greater detail and smoother transients—perfect for HiFi and studio listening. \u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSwap Op-Amps for Custom Sound: Comes with dual NE5532 op-amps in pluggable sockets. Fine-tune the sound signature to your liking, ideal for audiophiles, DIY enthusiasts, or anyone exploring different tones. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCompact Build, Big Performance: Built with a mini aluminum enclosure, the P10 blends seamlessly into any desktop audio setup. With an included power adapter, it offers stable performance and clean output.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eWarm tips\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e1. Please use the supplied DC 5V\/2A power adapter to ensure optimal performance of the P10. If using other power supply, make sure it provides at least 1A current. Otherwise, the P10 may not function properly. \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e2. The RCA and AUX inputs, as well as the 3.5mm and 6.35mm outputs, work at the same time. Please don’t connect the two inputs at the same time, or else audio signals will be mixed.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e3. P10 adopts 2PCS pluggable NE5532 op-amps, which can be upgraded by LME49720NA-DIP-8 or any other dual op-amp in an 8-pin package with an output current exceeding 50mA.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e4. P10 can easily drive all headphones even with high-impedance such as HD580\/HD600\/HD650\/K701\/K702\/Q701\/DT880\/T70\/T90\/SR225\/SR325\/RS1e etc.\u003c\/span\u003e\u003c\/div\u003e\n\u003chr\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eParameters\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cli data-end=\"1965\" data-start=\"1626\"\u003e\u003cspan\u003eBrand: Nobsound \u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"1965\" data-start=\"1626\"\u003e\u003cspan\u003eModel: P10\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"1965\" data-start=\"1626\"\u003e\u003cspan\u003eAudio input: Stereo RCA\/3.5mm AUX\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"1965\" data-start=\"1626\"\u003e\u003cspan\u003eAudio output: 3.5mm\/6.35mm headphone jack\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"1965\" data-start=\"1626\"\u003e\u003cspan\u003eOutput power: ≥1100mW (32Ω)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"1965\" data-start=\"1626\"\u003e\u003cspan\u003eMatched headphone impedance: 24-600Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency response: 20-30KHz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSNR: ≥ 110dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutput voltage swing: 30V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput voltage: DC 5V\/≥ 1A (5.5*2.5mm)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W*D*H): 78*82*32mm \/ 3.07*3.23*1.26in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage dimensions (W*D*H): 135*85*90mm \/ 5.31*3.34*3.54in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet weight: 210g \/ 0.46lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage weight: 400g \/ 0.88lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking list\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* P10 Headphone Amp\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* DC 5V Power Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":47751464616168,"sku":"XZ-P10-US","price":39.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47751464648936,"sku":"XZ-P10-UK","price":39.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47751464681704,"sku":"XZ-P10-DE","price":39.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47751464714472,"sku":"XZ-P10-AU","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Other","offer_id":47751464747240,"sku":"XZ-P10","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_091fd387-0280-4ee0-9fb2-426aa4589903.jpg?v=1760938965"},{"product_id":"nobsound-tube-t4c-hifi-stereo-vacuum-tube-preamp","title":"Nobsound TUBE-T4C HiFi Stereo Vacuum Tube Preamp","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eThe Heart of Your HiFi System: TUBE-T4C, a stereo tube preamp designed for your home audio setup. Featuring standard RCA input and output, it effortlessly connects to a wide range of audio sources like PC, phone, tablet, or CD player etc. Simply link its output to your existing power amplifier or active speakers for an instant, significant sound upgrade.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eElevate Your Sound: This Class A tube preamp breathes new life into your tracks, filtering out digital harshness and imbuing your audio with an irresistible warmth, rich depth, and expansive soundstage. Its reasonable circuit layout ensures a silent background and clean output.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCustomize Your Audio: Tailor your sound by simply swapping tubes. Explore different sonic flavors and personalize your listening experience. It's a simple way to customize your audio and discover new dimensions in your favorite tracks.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePrecise Tone Control: Fine-tune your audio to perfection with independent bass and treble knobs. Easily adapt the sound to suit your gear and personal taste. Whether you're an audiophile or just love great sound, the precise tone control can get the most out of your HiFi setup.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCompact Size Fits Any Setup: Designed for modern living, the mini preamp boasts a compact size that seamlessly fits into any desktop audio setup. Get rich, warm analog sound in a small footprint, making it the perfect choice for space-conscious audio enthusiasts.   \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eWarm tips\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e1.The TUBE-T4C is a preamplifier and must be paired with a power amplifier or active speakers. It cannot directly connect passive speakers. \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e2.Please use the supplied DC 5V\/2A power adapter to ensure optimal performance of the TUBE-T4C. If using other power supply, make sure it provides at least 2A current. Otherwise, the TUBE-T4C may not function properly. \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e3.TUBE-T4C adopts pluggable tube socket, default 6J5 vacuum tubes, can be replaced by 6J1, 5654, 6AK5, EF95 etc. For a full list of compatible tube models, please refer to the user manual.   \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Nobsound\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: TUBE-T4C\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio input: Stereo RCA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio output: Stereo RCA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency response: 20-30KHz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSNR: 100dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVoltage amplification: 2.5 times\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput voltage: DC 5V\/≥ 2A (5.5*2.5mm) \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W*D*H): 78*82*32mm \/ 3.07*3.23*1.26in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage dimensions (W*D*H): 135*85*90mm \/ 5.31*3.34*3.54in \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet weight: 230g\/ 0.51lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage weight: 400g \/ 0.88lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking list\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* TUBE-T4C Preamp\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2* 6J5 Tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* DC 5V Power Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"doukaudio","offers":[{"title":"US","offer_id":47751490339048,"sku":"XZ-TUBE-T4C-US","price":49.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47751490371816,"sku":"XZ-TUBE-T4C-UK","price":49.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47751490404584,"sku":"XZ-TUBE-T4C-DE","price":49.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47751490437352,"sku":"XZ-TUBE-T4C-AU","price":49.99,"currency_code":"USD","in_stock":true},{"title":"Other","offer_id":47751490470120,"sku":"XZ-TUBE-T4C","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_f103a907-073c-4f06-9e2e-e204b2b03790.jpg?v=1760939380"},{"product_id":"nobsound-ns-05p-pro-hifi-xlr-balanced-rca-audio-converter-bi-directional-adapter","title":"Nobsound NS-05P PRO HiFi XLR Balanced\/ RCA Audio Converter","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBi-Directional RCA \u0026amp; XLR Converter: Seamlessly transforms RCA (unbalanced) to XLR (balanced) and XLR to RCA. It's the perfect solution for bridging consumer Hi-Fi gear with professional audio equipment, in either direction.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eTrue Balanced Circuitry for Pristine Sound: Upgrades your RCA signal to true balanced XLR. It eliminates unwanted electrical hum, buzz, and ground loop noise that contaminates your sound. Enjoy a cleaner, more detailed sound with improved signal integrity.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eDual-Path with Independent Control: The two conversion paths are fully independent and can operate simultaneously without interference. Each features its own volume knob, acting as a mini-preamp for precise level matching between your components.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eComplete Audio Compatibility: Effortlessly integrate devices such as mixers, audio interfaces, active studio monitors, power amplifiers, DACs etc., ensuring stable, high-quality signal transmission for both home stereo setups and advanced audio systems.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003ePremium Aluminum Build: Crafted from a solid, compact aluminum chassis, the NS-05P PRO not only fits your desk but also provides robust shielding. It effectively blocks external interference, guaranteeing pure signal for Hi-Fi listening.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Is the RCA-to-XLR conversion on the NS-05P PRO a true balanced output?\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eA: Yes. The NS-05P PRO features a fully differential design, delivering a true balanced signal when converting from RCA to XLR.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Can the NS-05P PRO operate both RCA-to-XLR and XLR-to-RCA paths simultaneously?\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eA: Yes. The two signal paths are fully independent, allowing both conversions to function at the same time without interference.\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Why is the NS-05P PRO not working?\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eA: 1. The NS-05P PRO is an active converter and requires a DC 5V (≥1A) power supply to function properly. Please check if the power supply work well.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e     2. Please ensure the RCA and XLR ports are connected correctly: \u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eLeft half: RCA input → XLR output; Right half: XLR input → RCA output. The NS-05P PRO does not support RCA-to-RCA or XLR-to-XLR connections. Incorrect connections will result in no signal output.\u003cbr\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Why does the output volume of NS-05P PRO differ in RCA-to-XLR and XLR-to-RCA modes?\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eA: When the volume knob is turned to maximum, XLR-to-RCA mode provides the maximum gain of +5dB, resulting in a louder output. In RCA-to-XLR mode, the maximum gain is 0 dB.\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: What should I do if I hear hum or background noise when using the NS-05P PRO?\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eA: Please use a wire to connect the GND on the NS-05P PRO to a real earth ground or to the metal chassis of another equipment. If the issue persists, please contact us for further assistance.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Nobsound\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: NS-05P PRO\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eAudio input: \u003c\/span\u003e\u003cspan\u003eRCA \/ XLR\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eAudio output: XLR\u003c\/span\u003e\u003cspan\u003e \/ RCA\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eWork modes: \u003c\/span\u003e\u003cspan\u003eRCA IN→XLR OUT \/ \u003c\/span\u003e\u003cspan\u003eXLR IN→RCA OUT\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePower required: Yes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eGain: \u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eXLR→RCA\u003c\/span\u003e\u003cspan\u003e: \u003c\/span\u003e\u003cspan\u003e5dB\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eRCA\u003c\/span\u003e\u003cspan\u003e→\u003c\/span\u003e\u003cspan\u003eXLR: 0\u003c\/span\u003e\u003cspan\u003edB\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eTHD+N: \u003c\/span\u003e\u003cspan\u003e0.008%\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTHD: 0.00007%  \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSNR: ≥89dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eChannel balance (L\/R): ≤0.01dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency response: 20Hz-20kHz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput impedance: 20kΩ\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutput impedance: 100Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRCA output level: 2Vms (max)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSeparate volume control: Supported\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput voltage: DC5V(≥1A)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePower interface: USB Type-C\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W*D*H): 155*70*42mm \/ 6.10*2.76*1.65in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet weight: 420g \/ 0.921b\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage weight: 600g \/ 1.321b \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* NS-05P PRO Converter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* USB Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":47754535076072,"sku":"XX-NS-05P-PRO-US","price":59.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47754535108840,"sku":"XX-NS-05P-PRO-UK","price":59.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47754535141608,"sku":"XX-NS-05P-PRO-DE","price":59.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47754535174376,"sku":"XX-NS-05P-PRO-AU","price":59.99,"currency_code":"USD","in_stock":true},{"title":"Other","offer_id":47754535207144,"sku":"XX-NS-05P-PRO","price":59.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/2_a71b30d6-e0e8-4955-b642-3ec8f11f80d1.jpg?v=1761184452"},{"product_id":"ampapa-q1","title":"Ampapa Q1 HIFI ESS9039+AK4493 Desktop DAC [Based on DAC-Q11]","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eNext-Gen DAC Performance: A fully upgraded successor to the Douk Audio DAC-Q11, the Q1 retains its signature dual-DAC design while improving every core spec with cutting-edge ESS9039, AK4493, XMOS XU316, Bluetooth 5.2 and vivid OLED display. High-res support up to PCM 768kHz\/32bit and DSD512 delivers studio-level clarity.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eDual DAC Architecture: Easily switch between ESS9039 for clean, analytical sound or AK4493 for smoother musicality. Assign your preferred DAC chip and filter mode to each LINE and headphone output, tailoring sound to different genres, gear, or moods. SINAD ≥113dB, THD+N as low as 0.0002%, ensuring clean, distortion-free audio.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eExpressive Display with Style: The screen clearly shows input mode, DAC chip assignment, USB driver mode, and volume—everything you need at a glance. Q1 also offers 11 unique display modes, including diverse retro-style VU meters, audio spectrum, spinning vinyl, and cassette-style reels, each adding visual character to your HiFi setup.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eInput and Output Versatility: Supports USB-C with UAC 1.0\/2.0 modes for wider compatibility, including gaming consoles, plus Bluetooth with aptX\/aptX-HD, coaxial, and optical inputs. Q1 has 2xRCA and 2xbalanced TRS outputs, powering up to four amps or active speakers at once. A 3.5mm headphone jack offers personal listening with 1000mW output and two gain levels for optimal performance with both IEMs and high-impedance headphones.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFull Control at Your Fingertips: Customize your audio with four swappable LM49720 op-amps, easily accessible via a top window. Q1 also features full-spectrum RGB lighting, remote control, Bluetooth reset, adjustable brightness, and 12V trigger out. Perfectly matched with the Ampapa D1 for a cohesive stack both visually and functionally.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eQ: What operating systems are compatible with the Q1’s USB connection, and do I need to install a driver?\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e Q1 \u003c\/span\u003e\u003cspan\u003esupports\u003c\/span\u003e\u003cspan\u003e Windows 10\/11, macOS, Android, iOS, and audio-focused Linux (e.g. Volumio, ROON). USB connection with phones requires OTG support. No drivers \u003c\/span\u003e\u003cspan\u003eneeded\u003c\/span\u003e\u003cspan\u003e for mobile devices, macOs, or Linux. Windows needs a driver only in UAC 2.0 mode.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003cstrong data-end=\"639\" data-start=\"581\"\u003eQ: Can I remove the mesh layer on the Q1’s top window?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr data-end=\"642\" data-start=\"639\"\u003e\u003cspan\u003e\u003cstrong data-end=\"650\" data-start=\"644\"\u003eA:\u003c\/strong\u003e No. It’s a built-in EMI shield to prevent signal interference. Please do not remove it, and keep phones or routers away from the Q1.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003cstrong data-end=\"590\" data-start=\"543\"\u003eQ: Can I replace the op-amps in the Q1?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr data-end=\"593\" data-start=\"590\"\u003e\u003cspan\u003e\u003cstrong data-end=\"599\" data-start=\"593\"\u003eA:\u003c\/strong\u003e Yes, the Q1 uses 4PCs pluggable LM49720 op-amps, which can be replaced by standard dual op-amps like 2604\/2134\/muses02 etc. \u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003cstrong data-end=\"814\" data-start=\"748\"\u003eQ: Why don't the single VU meter and spectrum display work properly?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr data-end=\"817\" data-start=\"814\"\u003e\u003cspan\u003e\u003cstrong data-end=\"823\" data-start=\"817\"\u003eA:\u003c\/strong\u003e In single VU meter and spectrum modes, the Q1 only detects the left channel input. If only the right channel is connected, the VU meter and spectrum display will not operate. \u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003cstrong\u003eQ: Why can't I find Q1 in my Bluetooth list?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr data-end=\"507\" data-start=\"504\"\u003e\u003cspan\u003e\u003cstrong\u003eA: \u003c\/strong\u003eMake sure Q1 is set to Bluetooth mode, then turn on Bluetooth on your phone and search for \"AMPAPA Q1\" to connect. If Q1 still doesn't appear, try clearing previous connections using the remote control.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003cstrong data-end=\"596\" data-start=\"523\"\u003eQ: Why do the vinyl and tape-style displays spin at a constant speed?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr data-end=\"599\" data-start=\"596\"\u003e\u003cspan\u003e\u003cstrong data-end=\"605\" data-start=\"599\"\u003eA:\u003c\/strong\u003e These two display modes don’t react to audio signals, so they simply maintain a constant rotation speed. Even if the music is paused,the rotation continues as long as the mode is engaged. \u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003cstrong\u003eQ: Why does the VU meter show a large deflection at low volume, but a smaller deflection at high volume? \u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e The Q1 features an automatic gain control system (AGC) for the VU meters. \u003c\/span\u003e\u003cspan\u003eWhen the input signal is low, the system switches to high gain; when the \u003c\/span\u003e\u003cspan\u003esignal is high, it switches to low gain. This ensures the VU meters maintain \u003c\/span\u003e\u003cspan\u003esufficient deflection across different volume levels.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003cstrong\u003eQ: Does the remote control include batteries?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eA: \u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003eFor safer and faster delivery, the remote control may not include batteries (AAA*2). Please prepare them yourself.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Ampapa\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: Q1\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio input: Bluetooth 5.2 \/ USB-C \/ Coaxial \/ Optical\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio output: 2 sets of RCA \/ 2 sets of balanced TRS \/ 3.5mm headphone jack\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eChipset: ESS9039Q2M+AK4493+XMOS XU316+QCC304X+LM49720\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eMax. sampling rate supported:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePC-USB: PCM 768KHz\/32bit, DSD(Native) 512, DSD(DoP) 256\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCoaxial \/ Optical: PCM 192KHz\/24bit, DSD(DoP) 64\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBluetooth 5.2: 48KHz\/24Bit\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUSB supported operating systems: W10\/W11\/macOs\/Linux\/Android\/iOS\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBluetooth supported codecs: SBC\/aptX\/aptX-HD\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency response: 20Hz-20kHz (±0.2dB)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTHD+N: 0.0002%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSNR: ≥120dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax. output level: RCA: 2V   TRS: 4V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eMax. headphone output power\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eHigh gain: 1000mW@32Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLow gain: 380mW@32Ω \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMatched headphone impedance: 16-600Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput sensitivity: 0dBFS\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUSB driver mode: UAC 1.0\/2.0\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRemote control: Supported\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eScreen display: 11 VU modes +1 working status mode\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBacklight brightness: 10-level adjustment\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLED color: Infinite RGB color combinations\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWorking voltage: DC 12V (5.5*2.1mm)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W*D*H): 155*124*42mm \/ 6.10*4.88*1.65in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Dimensions (W*D*H): 300*230*70mm \/ 11.81*9.05*2.75in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet weight: 643g \/ 1.42lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage weight: 1.2kg \/ 2.64lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* Q1\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* DC 12V Power Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Bluetooth Antenna\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* USB-C to USB-A\/USB-C Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Optical Fiber Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* 3.5mm Trigger Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Remote Control (without battery)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Cleaning Cloth\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Certificate\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Warranty\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":47772093776104,"sku":"SUC-Q1-US","price":269.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":47772093808872,"sku":"SUC-Q1-UK","price":269.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":47772093841640,"sku":"SUC-Q1-DE","price":269.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":47772093874408,"sku":"SUC-Q1-AU","price":269.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":47772093907176,"sku":"SUC-Q1","price":269.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/00_c6fd70eb-f526-4dea-8fcf-ae28df9f4a60.jpg?v=1764921914"},{"product_id":"douk-audio-f2-single-ended-class-a-tube-amplifier-hifi-stereo-audio-integrated-tube-amp","title":"Nobsound F2 HiFi Single-Ended Class A Tube Amplifier","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-end=\"253\" data-start=\"0\"\u003e\n\u003cp data-end=\"253\" data-start=\"3\"\u003e\u003cspan\u003eTrue Class A Tube Warmth: Enjoy the rich, smooth tone of a single-ended Class A vacuum tube amp. F2 brings lifelike detail and natural dynamics to your home setup, perfect for relaxed, immersive listening with matched speakers. \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"504\" data-start=\"255\"\u003e\n\u003cp data-end=\"504\" data-start=\"258\"\u003e\u003cspan\u003eTube Rolling Friendly Design: All tubes are pluggable, letting you fine-tune the sound. Default with 5U4G, 6SN7GT and 6CA7 tubes. Enjoy the freedom to personalize tone and texture based on your gear and musical taste.  \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"764\" data-start=\"506\"\u003e\n\u003cp data-end=\"764\" data-start=\"509\"\u003e\u003cspan\u003eBuilt with Audiophile-Grade Parts: From a robust 160W transformer with Japan Z11 steel core to ALPS precision potentiometer and gold-plated terminals, F2 uses premium parts to reduce noise and elevate musical detail, bringing out the best in every track.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1028\" data-start=\"766\"\u003e\n\u003cp data-end=\"1028\" data-start=\"769\"\u003e\u003cspan\u003eEasy System Integration: Dual RCA inputs and front selector let you connect a DAC, network streamer, CD player or other audio sources and switch instantly, avoiding constant cable swaps and making F2 the heart of a flexible home stereo setup.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-is-last-node=\"\" data-end=\"1272\" data-start=\"1030\"\u003e\n\u003cp data-is-last-node=\"\" data-end=\"1272\" data-start=\"1033\"\u003e\u003cspan\u003ePrecision Drive for HiFi Sound: About 9W ×2 @8Ω Class A power can drive a wide range of bookshelf and floor-standing speakers, especially passive speakers rated around 10-100W with sensitivity≥88dB. Whether used in a desktop setup or living room, it delivers immersive musicality.  \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003eQ: What tubes can be replaced on the F2?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp data-end=\"1068\" data-start=\"1003\"\u003e\u003cspan\u003eA: The F2 supports tube rolling within compatible tube types.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"1281\" data-start=\"1075\"\u003e\u003cspan\u003e• Rectifier tube: 5U4G (default), compatible with 274B \/ 5Z3P \/ 5Z3PA\u003c\/span\u003e\u003cbr data-end=\"1147\" data-start=\"1144\"\u003e\u003cspan\u003e• Preamp tube: 6SN7GT (default), compatible with 6SN7 \/ CV181 \/ 6H8C \/ 6N8P\u003c\/span\u003e\u003cbr data-end=\"1227\" data-start=\"1224\"\u003e\u003cspan\u003e• Power tube: 6CA7 (default), compatible with EL34\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cspan\u003ePlease use compatible tube models and follow proper replacement procedures to ensure safe and stable operation.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003eQ: Can I use 6-ohm speakers with the F2? Which speaker terminals should I use?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eA: Yes. 6-ohm speakers are supported. You may connect them to either the 4Ω or 8Ω speaker terminals. In most setups, we recommend using the 8Ω terminals for better dynamics and output strength, while the 4Ω terminals may provide a slightly softer and smoother sound.\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Nobsound\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: F2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio input: 2 sets of RCA inputs\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio output: Banana speaker jacks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutput power: 9W ×2 RMS @ 8Ω (ultralinear operation)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency response: 20Hz-20KHz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTHD: \u0026lt; 1% (at 1kHz)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSNR: 88dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput sensitivity: 500mV-2000mV\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput impedance: 100KΩ\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCompatible speaker impedance: 4Ω-8Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput voltage: AC 110V-120V \/ 220V-240V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W*D*H): 310*225*200mm \/ 12.20*8.85*7.87in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet weight: 8.60kg \/ 18.96lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003ePackage weight: 10.50kg \/ 23.15lb\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* F2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Power Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48090621673704,"sku":"DZ112-US-1","price":349.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48090621706472,"sku":"DZ112-US-2","price":349.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48090621739240,"sku":"DZ112-US-3","price":349.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48090621772008,"sku":"DZ112-US-4","price":349.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48090621804776,"sku":"DZ112-US-5","price":349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/2_64f6acc1-cd04-424a-922e-5f7e369d3060.jpg?v=1767087057"},{"product_id":"pre-sale-douk-audio-tx1-word-clock","title":"Douk Audio TX1 Word Clock with 9 Display Modes, Music Spectrum","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"4\"\u003e\u003cspan\u003eRead Time in a New Way: More than a traditional clock, TX1 shows time in readable phrases or a classic digital display with second-level accuracy, making it more intuitive, engaging, and visually striking. A unique word clock that instantly elevates your desk, bedroom, office, studio, or living room.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"5\"\u003e\u003cspan\u003eVisual Modes for Every Mood: With 9 display modes, TX1 can be a clear clock during work, a sound-reactive spectrum display during music playback, or a playful animated accent for gaming and relaxation, making one clock feel practical, expressive, and never boring.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCustom Vibe and Glow: With 7 color styles and 5 brightness levels, TX1 adapts to how and where you use it. Pick a clean single-color look for focused moments, a multicolor style for RGB gaming setups, or a lower brightness level for bedside and late-night use without harsh glare.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFlexible Placement For Any Setup: TX1 gives you more ways to display it, from a desktop clock to a wall, pegboard, or magnetic surface. The support rod offers two viewing angles, the metal bracket adds height and tilt adjustment, and three USB-C ports keep cable routing neat.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePrecision Meets Design: The RX8025-T RTC keeps time accurate within 30 seconds per year and retains time for up to one month after power loss. CNC aluminum and black tempered glass front create a sleek, durable clock for daily use and a distinctive gift.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"US \/ Without Stand","offer_id":47960661917928,"sku":"XX-TX1-US","price":79.99,"currency_code":"USD","in_stock":true},{"title":"US \/ With Stand","offer_id":47960661950696,"sku":"XX-TX1-ZJ-US","price":99.99,"currency_code":"USD","in_stock":true},{"title":"UK \/ Without Stand","offer_id":47960661983464,"sku":"XX-TX1-UK","price":79.99,"currency_code":"USD","in_stock":true},{"title":"UK \/ With Stand","offer_id":47960662016232,"sku":"XX-TX1-ZJ-UK","price":99.99,"currency_code":"USD","in_stock":true},{"title":"EU \/ Without Stand","offer_id":47960662049000,"sku":"XX-TX1-DE","price":79.99,"currency_code":"USD","in_stock":true},{"title":"EU \/ With Stand","offer_id":47960662081768,"sku":"XX-TX1-ZJ-DE","price":99.99,"currency_code":"USD","in_stock":true},{"title":"AU \/ Without Stand","offer_id":47960662114536,"sku":"XX-TX1-AU","price":79.99,"currency_code":"USD","in_stock":true},{"title":"AU \/ With Stand","offer_id":47960662147304,"sku":"XX-TX1-ZJ-AU","price":99.99,"currency_code":"USD","in_stock":true},{"title":"China \/ Without Stand","offer_id":47960662180072,"sku":"XX-TX1","price":79.99,"currency_code":"USD","in_stock":true},{"title":"China \/ With Stand","offer_id":47960662212840,"sku":"XX-TX1-ZJ","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/0_532a9561-e338-4091-81e7-e6b1dea32c18.jpg?v=1779864651"},{"product_id":"burson-audio-v7-vivid-classic-discrete-dual-op-amp","title":"Burson Audio V7 Vivid \/ Classic Discrete Dual Op Amp (1 Pair)","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSound Quality Upgrade: Upgrading to the Burson V7 op amps delivers a clearly audible improvement over standard IC op amps, with greater clarity, stronger dynamics, richer tonal density, and a more open, realistic soundstage across the entire frequency range. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFully Discrete Architecture: The V7 uses a fully discrete component design instead of integrated chips, eliminating internal current limits and shared signal paths. This allows the audio signal to breathe freely, preserving fine detail, transient accuracy, and harmonic richness.   \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eMulti-Layer PCB Signal Isolation: Built with up to eight PCB layers, the V7 separates signal path, grounding, and shielding into dedicated layers. This optimized layout shortens the signal path, reduces interference, and improves transparency, accuracy, and overall analog performance.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eAdvanced Heat Dissipation: The V7 is designed to run at higher idle current for better sound quality and stability. Its high-density aluminum shell acts as an efficient heatsink, dispersing heat from each PCB layer while protecting sensitive components.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eDIP8 Universal Compatibility: Housed in a DIP8 compatible package, the V7 is a direct plug-and-play upgrade for IC op-amps (e.g., NE5532, OPA2604, LME49720). Bring measurable performance gains to amplifier, preamp, headphone amp, or CD player etc. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003eV7 Vivid\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eTuned for dynamism\u003c\/span\u003e\u003cspan\u003e, \u003c\/span\u003e\u003cspan\u003eclarity\u003c\/span\u003e\u003cspan\u003e, and \u003c\/span\u003e\u003cspan\u003eaccuracy, V7 Vivid delivers exceptional transparency and precise signal reproduction. It is especially well suited for DAC output stages.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp data-end=\"806\" data-start=\"562\"\u003e\u003cstrong data-end=\"576\" data-start=\"562\"\u003eV7 Classic\u003c\/strong\u003e\u003cbr data-end=\"579\" data-start=\"576\"\u003eVoiced for musical enjoyment, V7 Classic delivers intimate vocals, sparkling highs, and rich tonal texture. It matches Vivid’s ultra-low noise while improving dynamics and accuracy in the lower frequencies.  \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eWarm Tips\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e1. The V7 op amp is designed to operate at temperatures between 60-70°C. Before replacing the op amp, power off the device and allow a 5–10 minute cool-down period to avoid burns or damage.\u003cbr\u003e2. Always disconnect the power before installing or removing the op amp to maintain electrical safety.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e3. \u003c\/span\u003e\u003cspan\u003eEnsure correct orientation during installation.\u003c\/span\u003e\u003cspan\u003e Always align the notch on the op amp with the socket notch. If you are unsure, please contact customer support for guidance. Damage caused by incorrect installation is not covered by warranty or compensation.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePower Supply Range: ±4V \/ 8 VDC to ±16V \/ 30VDC\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCurrent Draw: up to 35mA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions: Height: 20mm, Width: 15.4mm, Depth: 13.4mm\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e2 × V7 Op Amp\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2 × DIP8 Socket\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2 × Silicon Retainer\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1 × “Voice By Burson” Sticker\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"doukaudio","offers":[{"title":"V7 Classic-2PCS \/ US","offer_id":48045431062760,"sku":"PJ-Burson-V7-Classic-US","price":199.99,"currency_code":"USD","in_stock":true},{"title":"V7 Classic-2PCS \/ UK","offer_id":48045431095528,"sku":"PJ-Burson-V7-Classic-UK","price":199.99,"currency_code":"USD","in_stock":true},{"title":"V7 Classic-2PCS \/ EU","offer_id":48045431128296,"sku":"PJ-Burson-V7-Classic-DE","price":199.99,"currency_code":"USD","in_stock":true},{"title":"V7 Classic-2PCS \/ AU","offer_id":48045431161064,"sku":"PJ-Burson-V7-Classic-AU","price":199.99,"currency_code":"USD","in_stock":true},{"title":"V7 Classic-2PCS \/ China","offer_id":48045431193832,"sku":"PJ-Burson-V7-Classic","price":199.99,"currency_code":"USD","in_stock":true},{"title":"V7 Vivid-2PCS \/ US","offer_id":48045431226600,"sku":"PJ-Burson-V7-Vivid-US","price":199.99,"currency_code":"USD","in_stock":true},{"title":"V7 Vivid-2PCS \/ UK","offer_id":48045431259368,"sku":"PJ-Burson-V7-Vivid-UK","price":199.99,"currency_code":"USD","in_stock":true},{"title":"V7 Vivid-2PCS \/ EU","offer_id":48045431292136,"sku":"PJ-Burson-V7-Vivid-DE","price":199.99,"currency_code":"USD","in_stock":true},{"title":"V7 Vivid-2PCS \/ AU","offer_id":48045431324904,"sku":"PJ-Burson-V7-Vivid-AU","price":199.99,"currency_code":"USD","in_stock":true},{"title":"V7 Vivid-2PCS \/ China","offer_id":48045431357672,"sku":"PJ-Burson-V7-Vivid","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/PJ-Burson-V7_3.png?v=1770354811"},{"product_id":"sparkos-labs-ss3602-discrete-dual-op-amp","title":"Sparkos Labs SS3602 Discrete Dual Op Amp (1PC)","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eSound Quality Upgrade: Upgrading to the Sparkos SS3602 discrete op amp can deliver a more realistic, detailed, and engaging sound than typical IC op amps, with improved imaging and soundstaging for high-performance audio systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eDual Discrete Architecture: The SS3602 is a true dual discrete op amp built from individual components, avoiding common IC limitations and enabling higher performance in gain, noise behavior, and drive capability in demanding audio signal paths.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eClass A Biased Output Stage: The output stage is biased into Class A operation. The SS3602 prioritizes linear, continuous operation and refined low-level detail. This design improves smoothness, and signal integrity, especially in critical gain and output stages.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eHigh Open-Loop Gain Design: With 140 dB open-loop gain and two-pole compensation, the SS3602 achieves excellent signal control and low noise operation. Its focus on accuracy and stability makes it especially suitable for DAC output stages, preamps, and buffers.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eDIP8 Universal Compatibility: Housed in a DIP8 compatible package, the SS3602 is a direct plug-and-play upgrade for IC op-amps (e.g., NE5532, OPA2604, LME49720). Bring measurable performance gains to amplifier, preamp, DAC, sound card etc. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003eWarm Tips\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e1. Always disconnect the power before installing or removing the op amp to ensure safety and prevent damage. \u003c\/div\u003e\n\u003cdiv\u003e2. Ensure correct orientation during installation. Always align the notch on the op amp with the socket notch. If you are unsure, please contact customer support for guidance. Damage caused by incorrect installation is not covered by warranty or compensation.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli data-end=\"282\" data-start=\"231\"\u003eProduct Type: Dual Discrete Operational Amplifier\u003c\/li\u003e\n\u003cli data-end=\"282\" data-start=\"231\"\u003ePackage: DIP8 Compatible\u003c\/li\u003e\n\u003cli data-end=\"344\" data-start=\"314\"\u003eOutput Stage: Class A Biased\u003c\/li\u003e\n\u003cli data-end=\"375\" data-start=\"347\"\u003eOpen-Loop Gain: 140 dB\u003c\/li\u003e\n\u003cli data-end=\"462\" data-start=\"416\"\u003eInput Offset Voltage: Typically \u0026lt; 250 µV @ ±12 Vcc\u003c\/li\u003e\n\u003cli data-end=\"506\" data-start=\"465\"\u003eCompensation: Two-Pole Compensation\u003c\/li\u003e\n\u003cli data-end=\"543\" data-start=\"509\"\u003ePin Finish: Gold-Plated Pins\u003c\/li\u003e\n\u003cli data-end=\"597\" data-start=\"546\"\u003eConstruction: Fully Discrete Component Design\u003c\/li\u003e\n\u003cli data-end=\"597\" data-start=\"546\"\u003e\u003cspan\u003eDimensions (Approx., from PCB seating plane):\u003cbr\u003eFootprint: ~15.0 × 13.75 mm\u003cbr\u003eHeight above PCB seating plane: ~10.5 mm\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cdiv\u003ePacking List\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1 × SS3602 Dual Discrete Op Amp\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1 × DIP8 Socket \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"doukaudio","offers":[{"title":"US","offer_id":48045504659688,"sku":"PJ-Sparkos-SS3602-US","price":89.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48045504692456,"sku":"PJ-Sparkos-SS3602-US","price":89.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48045504725224,"sku":"PJ-Sparkos-SS3602-US","price":89.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48045504757992,"sku":"PJ-Sparkos-SS3602-US","price":89.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48045504790760,"sku":"PJ-Sparkos-SS3602-US","price":89.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/PJ-Sparkos-SS3602_8.jpg?v=1770355800"},{"product_id":"douk-audio-bass-shaker-amplifier-for-tactile-transducer-subwoofer-100w","title":"Douk Audio G100 Bass Shaker Amplifier for Tactile Transducer\/Subwoofer 100W","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-end=\"561\" data-start=\"190\"\u003e\n\u003cspan\u003eBuilt for Real Tactile Bass:\u003cstrong data-end=\"224\" data-start=\"190\"\u003e \u003c\/strong\u003ePurpose-built bass shaker amplifier for tactile transducers. Designed to drive Douk Audio BS-1\/BS-2 and similar bass shakers, the G100 provides dedicated low-frequency power for adding more physical feedback to gaming chairs, home theater seats, sofas, and sim racing rigs.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli data-end=\"933\" data-start=\"563\"\u003e\u003cspan\u003eFlexible BTL\/PBTL Output Modes:\u003cstrong data-end=\"600\" data-start=\"563\"\u003e \u003c\/strong\u003eUse BTL mode to power two bass shakers with 50W×2 output for wider tactile coverage, or switch to PBTL mode for 100W×1 mono output to drive one shaker with stronger, more focused impact. Also supports passive subwoofers for more flexible setups.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli data-end=\"1294\" data-start=\"935\"\u003e\u003cspan\u003eAdjustable Low-Pass Filter:\u003cstrong data-end=\"968\" data-start=\"935\"\u003e \u003c\/strong\u003eThe 50–300Hz adjustable low-pass filter lets you control the bass range sent to your shaker, helping focus on deep effects like engines, explosions, impacts, and cinematic bass while reducing unwanted higher-frequency vibration for cleaner, tighter feedback.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli data-end=\"1653\" data-start=\"1296\"\u003e\u003cspan\u003eRCA and Bluetooth 5.3 Input:\u003cstrong data-end=\"1336\" data-start=\"1296\"\u003e \u003c\/strong\u003eConnect easily by RCA input from a TV, computer, audio player etc. or use Bluetooth 5.3 to receive wireless signals from phones, tablets, and computers. Bluetooth reset is also supported for easy reconnection. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli data-end=\"2051\" data-start=\"1655\"\u003e\u003cspan\u003eStable Build for Long Sessions: Optimized circuit design, upgraded heat dissipation, and quality components help maintain stable low-frequency output during long sessions. Its compact aluminum chassis fits beside your audio system, under a seat, or in tight spaces.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp data-end=\"308\" data-start=\"65\"\u003e\u003cstrong data-end=\"119\" data-start=\"65\"\u003eQ: Can the G100 be used as a full-range amplifier?\u003c\/strong\u003e\u003cbr data-end=\"122\" data-start=\"119\"\u003e\u003cstrong data-end=\"128\" data-start=\"122\"\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eNo. The G100 is designed for low-frequency output, not for driving regular full-range speakers. All outputs are limited to low-frequency signals by design and are optimized for subwoofer or bass shaker applications.\u003c\/p\u003e\n\u003cp data-end=\"668\" data-start=\"310\"\u003e\u003cstrong data-end=\"391\" data-start=\"310\"\u003eQ: What is the difference between BTL and PBTL modes? Which one should I use?\u003c\/strong\u003e\u003cbr data-end=\"394\" data-start=\"391\"\u003e\u003cstrong data-end=\"400\" data-start=\"394\"\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBTL mode is used to connect two passive subwoofers or bass shakers, with 50W×2 output at 4Ω. PBTL mode is used to connect one passive subwoofer or bass shaker with higher output, with 100W×1 output at 2Ω. Use the appropriate mode based on your setup and requirements.\u003c\/p\u003e\n\u003chr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: G100\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio Input: Bluetooth 5.3 \/ RCA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio Output: Speaker Output (BTL \/ PBTL)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eChips: TPA3116D2 + 4 × NE5532 (surface-mount)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax Output Power: BTL: 50W × 2 @ 4Ω; PBTL: 100W × 1 @ 2Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMatched Speaker Impedance: BTL: 4–8Ω; PBTL: 2–8Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLow-Pass Filter Adjustment Range: 50Hz–300Hz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLow-Pass Filter Slope: 24 dB\/octave\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTHD+N: 0.19%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSNR: ≥101dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput Sensitivity: RCA: 0.22V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput Voltage: DC 15–24V (5.5 × 2.5mm)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W × D × H): 124 × 114 × 33mm \/ 4.88 × 4.48 × 1.29in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Dimensions (W × D × H): 250 × 220 × 60mm \/ 9.84 × 8.66 × 2.36in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet Weight: 507g \/ 1.12lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Weight: 1.0kg \/ 2.20lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* G100\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* DC 24V Power Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Bluetooth Antenna\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48534448406760,"sku":"SUC-G100-US","price":72.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48534448439528,"sku":"SUC-G100-UK","price":72.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48534448472296,"sku":"SUC-G100-DE","price":72.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48534448505064,"sku":"SUC-G100-AU","price":72.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48534448537832,"sku":"SUC-G100","price":72.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/2_a320d16a-be0f-40fc-be32-ae7cca9dd0d9.jpg?v=1778464308"},{"product_id":"douk-audio-bs-2-30w-bass-shaker","title":"Douk Audio BS-2 30W Bass Shaker","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003eFeatures:\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-end=\"853\" data-start=\"514\"\u003e\u003cspan\u003eTactile Bass You Can Feel: The Douk Audio BS-2 is a bass shaker \/ tactile transducer designed to turn low-frequency signals into physical vibration. Feel bass effects from games, movies, music, home theater and sim racing with an added layer of tactile impact beyond regular audio playback. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"1180\" data-start=\"855\"\u003e\u003cspan\u003eEfficient 30W Output: Rated at 30W power with 4Ω impedance, the BS-2 is built for efficient low-frequency performance. Its high-sensitivity structure helps deliver strong physical feedback when paired with the Douk Audio G100 or a compatible amplifier.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"1540\" data-start=\"1182\"\u003e\u003cspan\u003eEngineered Internal Structure: Built with a high-strength ferrite magnet, precision voice coil, and optimized internal structure, the BS-2 responds quickly to low-frequency effects such as engines, explosions, impacts, and deep bass notes, making the feedback feel more direct and controlled.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"2248\" data-start=\"1884\"\u003e\u003cspan\u003eDurable for Daily Use: The rigid aluminum housing helps resist heat, impact, and deformation while improving heat dissipation during extended sessions. Reliability testing for load, humidity, temperature, vibration, and drop performance helps support stable long-term use.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"2248\" data-start=\"1884\"\u003e\u003cspan\u003eFlexible DIY Setup: Build your own tactile setup with one or multiple BS-2 units, and try different mounting positions to match your chair, sofa, bed frame, or platform. Different surfaces and locations can create different tactile effects, letting you explore the best tactile response.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e\u003cspan\u003eQ: Can the BS-2 be used as a regular speaker?\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong data-end=\"147\" data-start=\"69\"\u003e\u003cbr data-end=\"1197\" data-start=\"1194\"\u003e\u003cspan\u003e\u003cstrong data-end=\"1203\" data-start=\"1197\"\u003eA:\u003c\/strong\u003e \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003eNo. It is designed for low-frequency tactile feedback, not full-range sound playback.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp data-end=\"615\" data-start=\"358\"\u003e\u003cstrong\u003e\u003cspan\u003eQ: What amplifier should I use with the BS-2?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr data-end=\"411\" data-start=\"408\"\u003e\u003cspan\u003e\u003cstrong data-end=\"417\" data-start=\"411\"\u003eA:\u003c\/strong\u003e Use a bass shaker amplifier or compatible subwoofer amp with low-pass filter, such as the Douk Audio G100. A regular 4Ω amp can also drive it, but the vibration effect may be less ideal with full-range signals.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"864\" data-start=\"617\"\u003e\u003cstrong\u003e\u003cspan\u003eQ: How much amplifier power is safe for the BS-2?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr data-end=\"681\" data-start=\"678\"\u003e\u003cspan\u003e\u003cstrong data-end=\"687\" data-start=\"681\"\u003eA:\u003c\/strong\u003e The BS-2 is rated at 30W, with 50W max input power and 4Ω impedance. Do not exceed 50W per unit. For long-term use, keeping output closer to 30W is recommended.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"1117\" data-start=\"866\"\u003e\u003cstrong\u003e\u003cspan\u003eQ: Can I connect multiple BS-2 units together?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr data-end=\"920\" data-start=\"917\"\u003e\u003cspan\u003e\u003cstrong data-end=\"926\" data-start=\"920\"\u003eA:\u003c\/strong\u003e Yes, but total impedance changes with wiring. Two units in series equal about 8Ω, while two in parallel equal about 2Ω. Always confirm your amplifier supports the final impedance before use.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: BS-2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRated Impedance: 4Ω ±15%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRated Input Power: 30W\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax. Input Power: 50W\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eResonance Frequency (F0): 57–63Hz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSound Pressure Level: 62 ±3dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOperating Temperature: -20℃ to +70℃\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStorage Temperature: -30℃ to +70℃\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eProduct Dimensions: 86 × 89.7 × 38.5mm \/ 3.38 × 3.53 × 1.51in\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet Weight: 532g \/ 1.17lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Weight \u003cem\u003e(Single Unit)\u003c\/em\u003e: 640g \/ 1.41lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Weight \u003cem\u003e(Pair)\u003c\/em\u003e: 1.17kg \/ 2.58lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003chr\u003e\n\u003cp\u003ePacking List\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1 × BS-2 Bass Shaker \u003cem data-end=\"93\" data-start=\"71\"\u003e(Single Unit Option)\u003c\/em\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2 × BS-2 Bass Shakers \u003cem data-end=\"137\" data-start=\"122\"\u003e(Pair Option)\u003c\/em\u003e  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"1PC \/ US","offer_id":48534747644136,"sku":"SUC-BS-2-US","price":36.99,"currency_code":"USD","in_stock":true},{"title":"1PC \/ UK","offer_id":48534747676904,"sku":"SUC-BS-2-UK","price":36.99,"currency_code":"USD","in_stock":true},{"title":"1PC \/ EU","offer_id":48534747709672,"sku":"SUC-BS-2-DE","price":36.99,"currency_code":"USD","in_stock":true},{"title":"1PC \/ AU","offer_id":48534747742440,"sku":"SUC-BS-2-AU","price":36.99,"currency_code":"USD","in_stock":true},{"title":"1PC \/ China","offer_id":48534747775208,"sku":"SUC-BS-2","price":36.99,"currency_code":"USD","in_stock":true},{"title":"1Pair \/ US","offer_id":48550625738984,"sku":"SUC-BS-2-Pair-US","price":69.99,"currency_code":"USD","in_stock":true},{"title":"1Pair \/ UK","offer_id":48550625771752,"sku":"SUC-BS-2-Pair-UK","price":69.99,"currency_code":"USD","in_stock":true},{"title":"1Pair \/ EU","offer_id":48550625804520,"sku":"SUC-BS-2-Pair-DE","price":69.99,"currency_code":"USD","in_stock":true},{"title":"1Pair \/ AU","offer_id":48550625837288,"sku":"SUC-BS-2-Pair-AU","price":69.99,"currency_code":"USD","in_stock":true},{"title":"1Pair \/ China","offer_id":48550625870056,"sku":"SUC-BS-2-Pair","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/6_90ec2072-135a-479d-bf92-1cf274246505.jpg?v=1778478131"},{"product_id":"douk-audio-d2-15w-hifi-linear-power-supply-with-dc-usb-5v-output","title":"Douk Audio D2 15W HiFi Linear Power Supply with DC+USB 5V Output","description":"\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"8\"\u003e\u003cspan\u003e\u003cstrong data-end=\"307\" data-start=\"279\"\u003eCleaner 5V Linear Power:\u003c\/strong\u003e Replaces ordinary switching power adapters with clean, stable 5V DC power. The D2 helps reduce power-related noise and interference, giving your HiFi system a darker background, smoother highs, and more natural detail.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"9\"\u003e\u003cspan\u003e\u003cstrong\u003eUltra-Low Ripple Output\u003c\/strong\u003e: With ripple noise below 20μV under no-load conditions, 15W output power, and up to 2.5A current, the D2 provides a low-noise power foundation for sensitive audio circuits that require stable 5V supply.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong data-end=\"581\" data-start=\"553\"\u003eDual Output Convenience\u003c\/strong\u003e: Equipped with 1×USB-A and 1×DC output, the D2 can power two compatible 5V devices at the same time. Ideal for DACs, DDCs, Raspberry Pi, USB audio devices, and headphone amps etc.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"10\"\u003e\u003cspan\u003e\u003cstrong\u003eStable Power Architecture\u003c\/strong\u003e: Built with a custom sealed transformer, LM1085IT voltage regulator, Panasonic FM capacitors, and PTC resettable fuse. The design helps deliver steady 5V output, low-ripple DC power, and added circuit protection.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"12\"\u003e\u003cspan\u003e\u003cstrong\u003eCompact Aluminum Chassis\u003c\/strong\u003e: The CNC-machined aluminum chassis offers solid durability, better heat dissipation, and helps reduce external interference. Compact and stack-friendly, the D2 fits neatly into desktop HiFi, PC audio, and small home audio systems.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: The D2 has two output terminals. Can both terminals be used simultaneously at full rated current?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: No. You can connect two output devices at the same time, but the total current drawn from both outputs must not exceed the rated output current.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: The DC output jack is 5.5mm\/2.5mm, and my device's power jack is 5.5mm\/2.1mm. Are they compatible?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: Yes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: Is the output voltage of the D2 adjustable?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: The output voltage is typically fixed and can only be fine-tuned within about ±0.5V. Normally no adjustment is required.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: If I connect two devices to the D2 at the same time, will ground noise occur?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: It depends on the connected devices. If ground noise occurs when powering two devices, we recommend using the D2 to power only one device. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: My device requires a 5V \/ 1A power supply. Can I safely use the D2 5V \/ 2.5A output?  \u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: Yes. 2.5A is the maximum available current. Your device will only draw the current it needs, so it can be used safely.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: Why do the D2 generate more heat than switching power supplies? Is it safe?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA: It is normal. Linear power supplies operate at lower efficiency, so more energy is converted into heat. The D2 is safe when used within rated load limits.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: D2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutput Interface: DC \/ USB Port\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutput Voltage: DC 5V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutput Power: 15W\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRated Output Current: 2.5A\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRipple Noise: No load \u0026lt;20μV\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDC Output Connector: 5.5 × 2.5 mm, positive inside and negative outside, compatible with 5.5 × 2.1 mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput Voltage: AC 110V–120V \/ AC 220V–240V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W × D × H): 125 × 80 × 40 mm \/ 4.92 × 3.15 × 1.57 in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet Weight: 600 g \/ 1.32 lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Weight: 900 g \/ 1.98 lb \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* D2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* DC Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Power Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48560181608680,"sku":"LHY-D2-US","price":89.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48560181641448,"sku":"LHY-D2-UK","price":89.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48560181674216,"sku":"LHY-D2-DE","price":89.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48560181706984,"sku":"LHY-D2-AU","price":89.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48560181739752,"sku":"LHY-D2","price":89.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/9_d5a62d27-aaa6-4c48-82c1-dcad714890e8.jpg?v=1778824457"},{"product_id":"douk-audio-t12-hifi-tube-phono-preamp-for-mm-mc-turntables-headphone-amp-with-vu-meter","title":"Douk Audio T12 Tube Phono Preamp MM\/MC Turntable Headphone Amp","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-end=\"435\" data-start=\"194\"\u003e\u003cspan\u003eDisplay-Worthy Vintage Design: Real walnut housing, glowing tubes, and retro sliders give T12 the warm, nostalgic look of classic audio gear, turning a practical tube preamp into a refined HiFi piece that feels at home beside turntables, speakers, and records.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"662\" data-start=\"437\"\u003e\u003cspan\u003ePhono and Line-In Flexibility: Works with MM and MC turntable setups for vinyl playback, while the RCA line input connects CD players, DACs, streamers, or other analog sources, letting T12 serve as both a phono stage and tube preamp for everyday HiFi listening.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"881\" data-start=\"664\"\u003e\u003cspan\u003eBring Out the Tube Warmth: A 120V tube stage helps the 6J5B-Q tubes open up with a smoother, fuller analog tone. Along with low THD and high SNR, T12 gives vocals more body, music a warmer flow, and playback a cleaner foundation.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eTune Sound by Sight and Touch: Bass and treble adjust up to ±10dB, with center-detent sliders for an easy return to neutral. The visible slider positions are easy to read at a glance, helping you fine-tune sound for different records, speakers, rooms, or personal taste.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"1112\" data-start=\"883\"\u003e\u003cspan\u003eOutput Switching Made Easy: Dual RCA outputs let you switch between two amplifier or powered speaker systems for quick comparison or daily listening, without the hassle of repeated unplugging. The 3.5mm headphone output makes late-night personal listening easier.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48585375449320,"sku":"XX-T12-US","price":109.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48585375482088,"sku":"XX-T12-UK","price":109.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48585375514856,"sku":"XX-T12-DE","price":109.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48585375547624,"sku":"XX-T12-AU","price":109.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48585375580392,"sku":"XX-T12","price":109.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/0_efd1e6c3-2780-4d30-b746-bc5b2f2f53b0.jpg?v=1779698141"},{"product_id":"douk-audio-d2-pro-dc-12v-linear-power-supply-low-noise-35w","title":"Douk Audio D2-PRO 35W Linear Power Supply with Dual DC 12V OUT","description":"\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-end=\"3038\" data-start=\"2738\" data-section-id=\"1lkp4wv\"\u003e\u003cspan\u003eCleaner Linear Power Upgrade: Ordinary switching adapters can introduce ripple, electrical noise, and interference into sensitive audio gear. As a linear power supply, the D2-PRO helps create a darker background, smoother highs, and cleaner detail for a more refined listening experience.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"3324\" data-start=\"3040\" data-section-id=\"155koxo\"\u003e\u003cspan\u003e28μV Ultra-Low Ripple: Ripple noise is measured at only 28μV RMS under no-load conditions, giving sensitive audio circuits a cleaner power foundation. By reducing power-related noise at the source, it supports steadier imaging, cleaner dynamics, and more natural detail. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"3576\" data-start=\"3326\" data-section-id=\"1m1di7a\"\u003e\u003cspan\u003eLow-Noise Power Architecture: A sealed toroidal transformer, EMI suppression circuit, high-speed rectifier, large-capacity matrix filtering, and LDO regulator work together to isolate grid interference, smooth DC output, and deliver stable, well-regulated DC power.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"3843\" data-start=\"3578\" data-section-id=\"ypninp\"\u003e\u003cspan\u003e35W Dual DC Output: With up to 35W output power and 2.5A current capacity, the D2-PRO can run one or two compatible devices from the same clean regulated source. Dual DC outputs help create a more consistent low-noise power setup for compact HiFi systems.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"1526\" data-start=\"1260\" data-section-id=\"xwcji6\"\u003e\u003cspan\u003eMade for HiFi Audio Systems: Designed for 12V DACs, preamps, headphone amps, streamers, digital interfaces, audio switches, and network switches. The aluminum chassis helps improve heat dissipation and reduce external interference for stable daily use.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48612941037800,"sku":"LHY-D2-PRO-US","price":129.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48612941070568,"sku":"LHY-D2-PRO-UK","price":149.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48612941103336,"sku":"LHY-D2-PRO-DE","price":149.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48612941136104,"sku":"LHY-D2-PRO-AU","price":149.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48612941168872,"sku":"LHY-D2-PRO","price":149.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_8e979cae-0b14-4f1c-8fca-bdb96c9de4d5.jpg?v=1780452409"},{"product_id":"douk-audio-f3-hifi-tube-amplifier-class-a-single-ended-stereo-audio-amp","title":"Douk Audio F3 HiFi Tube Amplifier Class A Single-Ended Stereo Audio Amp","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSingle-ended Class A Tube Amp: The F3 uses a single-ended Class A tube circuit for smooth, continuous amplification, helping vocals sound softer, instruments more textured, and music more relaxed. Connect RCA line sources such as DACs, CD players, or streamers for a warm HiFi listening experience.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eClassic Analog Tube Sound: GE 6DK6 driver tubes help shape clear mids and vocal presence, while Valvo PL84 output tubes add warmth, rich harmonics, and natural tube character. Together, they create an analog tube sound that balances clarity, texture, and long-session listening comfort.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRefined 3.2W × 2 Class A Output: With 3.2W × 2 of pure Class A power, the F3 is tuned for high-sensitivity passive bookshelf speakers. Its smooth output character gives vocals more body, preserves natural dynamics, and keeps music relaxed, coherent, and easy to enjoy.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eReal-Time Music Spectrum Display: Watch your music come to life on the front spectrum display. Vibrant visual feedback matches the glowing tubes, giving you an immersive, analog-inspired experience that engages sight and hearing together, turning every track into a small performance. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eHandcrafted Wood Cabinet: Each F3 features a handcrafted wood cabinet with natural grain, making every unit unique. Compact and elegant, it blends seamlessly into your desktop or HiFi setup, adding tactile warmth and a refined, vintage feel to your listening environment. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003eQ: Why does my F3's wooden finish look slightly different from the pictures?\u003cbr data-end=\"146\" data-start=\"143\"\u003eA: The F3 features a real wood cabinet, handcrafted for each unit. Natural grain and color variations may occur, and minor cosmetic imperfections are normal, making each amplifier unique.  \u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eQ: Can I power on the F3 without speakers connected?\u003c\/span\u003e\u003cbr data-end=\"167\" data-start=\"164\"\u003e\u003cspan\u003eA: No. Always connect speakers before powering on. Operating without a load may damage the output transformer.  \u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Can I leave the volume knob at my usual listening position when turning the F3 on or off?\u003cbr data-end=\"394\" data-start=\"391\"\u003eA: No. Always set the volume knob to minimum before power on and power off to protect the tubes and internal circuitry.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Why does the F3 sound tight or thin right after turning on?\u003cbr data-end=\"1246\" data-start=\"1243\"\u003eA: This is normal. Tubes require 30–60 minutes to reach proper operating temperature, after which sound becomes smoother and more natural.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Some tube sockets appear to have missing pin contacts. Is this a defect?\u003cbr data-end=\"1484\" data-start=\"1481\"\u003eA: No. Some ceramic tube sockets are designed without contacts for unused tube pins. It does not affect performance.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eQ: Can I upgrade or replace tubes with other models?\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eA: No. Using other types may damage the F3. The model of the supplied tubes may vary depending on the production batch, which is normal. Please refer to the actual product received.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: F3\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio Input: Stereo RCA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio Output: Banana Speaker Jacks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVacuum Tubes: PL84 × 2, 6DK6 × 2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutput Power: 3.2W × 2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOutput Impedance: 4Ω \/ 8Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSNR: ≥ 85 dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTHD (at rated power): ≤ 7%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency Response: 30Hz – 20kHz (±3dB)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput Sensitivity: 500mV – 2V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRated Power Consumption: 42W\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInput Voltage: AC 100–240V, 50\/60Hz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W × D × H): 180 × 144 × 115 mm \/ 7.09 × 5.67 × 4.53 in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet Weight: 2.5 kg \/ 5.51 lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Weight: 2.9 kg \/ 6.39 lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1 × F3\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2 × 6DK6 Tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2 × PL84 Tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1 × Power Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48629369831656,"sku":"DZ115-US","price":299.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48629369864424,"sku":"DZ115-UK","price":299.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48629369897192,"sku":"DZ115-DE","price":299.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48629369929960,"sku":"DZ115-AU","price":299.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48629369962728,"sku":"DZ115","price":299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_1c1ede67-efd4-412d-ad74-e9b7fe51a41b.jpg?v=1780905980"},{"product_id":"douk-audio-h5-hifi-tube-mm-phono-preamp-w-sub-out","title":"Douk Audio H5 Tube Preamp with LPF \/ HPF","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eA Natural Partner for A5: H5 is designed to visually and sonically complement the A5 amplifier, sharing a compact black HiFi look while adding tube warmth, MM phono input, tone control, and refined subwoofer integration for a richer, more complete stereo system.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFlexible Phono and RCA Input: Use MM Phono for MM turntables and RCA Line In for DACs, CD players, streamers, computers, and more. The 20Hz HPF helps tame unwanted vinyl rumble, keeping record playback cleaner, steadier, and more controlled. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eDual Outputs with Subwoofer Control: Dual RCA outputs let H5 feed two amplifiers or powered speakers at the same time, making it easier to expand your HiFi setup. SUB Out with 180\/250Hz LPF helps reduce boomy overlap with main speakers for fuller, cleaner, better-integrated bass.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eOptimized GE-4BZ6 Tube Character: Tuned around GE-4BZ6 tubes with 180V tube drive, H5 brings smooth warmth, rich midrange body, and natural analog depth to vocals, jazz, and vinyl playback, giving you a refined tube sound from the start without chasing tube upgrades.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eShape Sound With Refined Control: Bass and treble controls make quick sound adjustment easy, while shielded tube power and 4th-gen relay help reduce interference and switching noise. A pluggable NE5532 op-amp leaves room for experienced users to explore different sound flavors. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong data-end=\"202\" data-start=\"125\"\u003eQ: Does the 20Hz high-pass filter work with all inputs?\u003cbr data-end=\"534\" data-start=\"531\"\u003eA: \u003c\/strong\u003eNo. The 20Hz HPF works only in Phono input mode. It is designed to help reduce ultra-low-frequency rumble from turntable playback, such as record warp or turntable vibration.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong data-end=\"988\" data-start=\"940\"\u003eQ: What devices can be connected to SUB Out?\u003c\/strong\u003e\u003cbr data-end=\"991\" data-start=\"988\"\u003e\u003cstrong data-end=\"997\" data-start=\"991\"\u003eA:\u003c\/strong\u003e SUB Out uses a single RCA connector for powered subwoofers and sends low-frequency signals only. The LPF applies only to SUB Out. Bass and treble controls do not affect SUB Out, while the volume knob controls both RCA outputs and SUB Out together.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong data-end=\"1793\" data-start=\"1751\"\u003eQ: Does H5 support op-amp replacement?\u003c\/strong\u003e\u003cbr data-end=\"1796\" data-start=\"1793\"\u003e\u003cstrong data-end=\"1802\" data-start=\"1796\"\u003eA:\u003c\/strong\u003e Yes. H5 includes one socketed NE5532 dual op-amp. You may replace it with compatible dual op-amps such as OPA2604, OPA2134, LM49720, or MUSES02.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong data-end=\"1335\" data-start=\"1295\"\u003eQ: Does H5 support tube replacement?\u003c\/strong\u003e\u003cbr data-end=\"1338\" data-start=\"1335\"\u003e\u003cstrong data-end=\"1344\" data-start=\"1338\"\u003eA:\u003c\/strong\u003e Yes. H5 uses 4BZ6 tubes and supports replacement with the same 4BZ6 tube type only. Do not use other tube models unless compatibility is confirmed with us. Always power off H5 before replacing the tubes.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong data-end=\"202\" data-start=\"125\"\u003eQ: Can RCA 1 and RCA 2 be switched independently?\u003cbr data-end=\"810\" data-start=\"807\"\u003eA: \u003c\/strong\u003eNo. RCA 1 and RCA 2 output the same signal simultaneously and cannot be switched independently.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong data-end=\"202\" data-start=\"125\"\u003eQ: Which input should I use for a turntable with a built-in phono preamp?\u003c\/strong\u003e\u003cbr data-end=\"205\" data-start=\"202\"\u003e\u003cstrong data-end=\"211\" data-start=\"205\"\u003eA:\u003c\/strong\u003e Please connect it to the RCA input. The Phono input is designed for turntables without a built-in phono preamp. Connecting a built-in phono preamp turntable to the Phono input may cause noise, distortion, or abnormal sound.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong data-end=\"2113\" data-start=\"2074\"\u003eQ: What power adapter should I use?\u003c\/strong\u003e\u003cbr data-end=\"2116\" data-start=\"2113\"\u003e\u003cstrong data-end=\"2122\" data-start=\"2116\"\u003eA:\u003c\/strong\u003e Please use the included DC 12V\/2A power adapter. If using another adapter, make sure it is a high-quality DC 12V adapter rated at 1.5A or above.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eParameters\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli data-end=\"46\" data-start=\"7\"\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"46\" data-start=\"7\"\u003e\u003cspan\u003eModel: H5\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"126\" data-start=\"48\"\u003e\u003cspan\u003eAudio Input: MM Phono \/ RCA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"126\" data-start=\"48\"\u003e\u003cspan\u003eAudio Output: 2× RCA Outputs \/ SUB Out\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"126\" data-start=\"48\"\u003e\n\u003cspan\u003eFrequency Response:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli data-end=\"126\" data-start=\"48\"\u003e\u003cspan\u003ePhono Input: conforms to RIAA characteristics\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"126\" data-start=\"48\"\u003e\u003cspan\u003eRCA Input: 20Hz–20kHz (±0.3dB)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"285\" data-start=\"234\"\u003e\n\u003cspan\u003eTHD+N:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli data-end=\"285\" data-start=\"234\"\u003e\u003cspan\u003ePhono Input: 0.15%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"285\" data-start=\"234\"\u003e\u003cspan\u003eRCA Input: 0.5%\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"338\" data-start=\"287\"\u003e\n\u003cspan\u003eSNR:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli data-end=\"338\" data-start=\"287\"\u003e\u003cspan\u003ePhono Input: ≥78dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"338\" data-start=\"287\"\u003e\u003cspan\u003eRCA Input: ≥104dB\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"399\" data-start=\"340\"\u003e\n\u003cspan\u003eInput Sensitivity:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli data-end=\"399\" data-start=\"340\"\u003e\u003cspan\u003ePhono Input: 5mV\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"399\" data-start=\"340\"\u003e\u003cspan\u003eRCA Input: 1V\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"462\" data-start=\"401\"\u003e\n\u003cspan\u003eMax. Output Level:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli data-end=\"462\" data-start=\"401\"\u003e\u003cspan\u003ePhono Input: 500mV\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"462\" data-start=\"401\"\u003e\u003cspan\u003eRCA Input: 2V\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"554\" data-start=\"464\"\u003e\n\u003cspan\u003eSUB Max. Output Level:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli data-end=\"554\" data-start=\"464\"\u003e\u003cspan\u003e180Hz cutoff frequency: 3.2V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"554\" data-start=\"464\"\u003e\u003cspan\u003e250Hz cutoff frequency: 5.5V\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"601\" data-start=\"556\"\u003e\u003cspan\u003eHigh-Pass Filter Cutoff Frequency: 20Hz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"634\" data-start=\"603\"\u003e\u003cspan\u003eBass \/ Treble Range: ±6dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"680\" data-start=\"636\"\u003e\u003cspan\u003eInput Voltage: DC 12V ≥1.5A, 5.5 × 2.1mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"742\" data-start=\"682\"\u003e\u003cspan\u003ePackage Size (W × D × H): 265 × 240 × 65mm \/ 10.43 × 9.45 × 2.56in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-end=\"778\" data-start=\"744\"\u003e\u003cspan\u003ePackage Weight: 0.8kg \/ 1.76lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1 × H5\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2 × 4BZ6 Tubes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1 × DC 12V Power Supply\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1 × User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48633224200424,"sku":"SUC-H5-US","price":89.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48633224233192,"sku":"SUC-H5-UK","price":89.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48633224265960,"sku":"SUC-H5-DE","price":89.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48633224298728,"sku":"SUC-H5-AU","price":89.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48633224331496,"sku":"SUC-H5","price":89.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_790b6b58-fa3a-4560-b86f-cd608f894a02.jpg?v=1781062233"},{"product_id":"douk-audio-vfd253-4-channel-audio-selector-music-spectrum-display","title":"Douk Audio VFD253-PRO 4 Channel Audio Selector Music Spectrum Display","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFlexible 4-Channel RCA Routing: Works as a 1-in-4-out distributor or 4-in-1-out selector to manage your HiFi system with less cable swapping. Send one source to one, several, or all selected outputs, or switch between multiple sources with ease. Lighted buttons show the active channel at a glance.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e25-Band VFD Spectrum Visualizer: The 25×15 VFD display turns music into real-time spectrum motion with clearer frequency layers and richer visual detail. Use line-in RCA for direct signal tracking, or built-in MIC pickup to capture nearby sound for easier visual display across more setups.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCustomizable Spectrum Display: Multiple modes, range selection, gain, brightness, and response tuning help the spectrum stay clear, full, and engaging across different sources and listening styles. Whether the signal is weak, the room is bright, or you prefer truer response over smoother motion, you can tune the display to look right.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eDirect Isolated Signal Path: RCA input and output are directly connected without op-amp processing, keeping the audio path simple and clean. Transformer isolation separates the VFD drive circuit from the audio route, helping reduce display-related interference while preserving your original signal.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBuilt for Daily HiFi Use: The remote control gives quick access to channel selection, brightness, spectrum response, and clock settings etc. Accurate clock display adds practical desktop use, while aluminum housing and tempered glass bring a solid, refined finish to your HiFi setup. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv data-is-intersecting=\"true\" data-turn-id-container=\"df0ed69b-ad47-4d85-b708-7062d419f470\"\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv data-is-intersecting=\"true\" data-turn-id-container=\"request-6a18043f-95f8-83a9-8a9b-c12c437eb771-73\"\u003e\n\u003csection dir=\"auto\" data-turn=\"assistant\" data-scroll-anchor=\"false\" data-testid=\"conversation-turn-148\" data-turn-id-container=\"request-6a18043f-95f8-83a9-8a9b-c12c437eb771-73\" data-turn-id=\"request-6a18043f-95f8-83a9-8a9b-c12c437eb771-73\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\"\u003e\n\u003cdiv dir=\"auto\" data-turn-start-message=\"true\" data-message-model-slug=\"gpt-5-5-thinking\" data-message-id=\"c4d41c16-f844-49ae-b9be-15fe842270c9\" data-message-author-role=\"assistant\" tabindex=\"0\"\u003e\n\u003cp data-end=\"216\" data-start=\"0\"\u003e\u003cstrong\u003eQ: Can the VFD253 Pro be used as a mixer?\u003c\/strong\u003e\u003cbr data-end=\"44\" data-start=\"41\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eNo. It does not provide independent volume control for each channel. It is more suitable as an audio switcher or splitter rather than a mixer.  \u003c\/p\u003e\n\u003cp data-end=\"495\" data-start=\"218\"\u003e\u003cstrong\u003eQ: What signal does the spectrum display show?\u003c\/strong\u003e\u003cbr data-end=\"267\" data-start=\"264\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe spectrum comes from the rear I\/O port. In 1-in-4-out mode, it shows the source signal. In 4-in-1-out mode, it follows the selected input. If multiple inputs are selected, it may show combined signal, but this is not recommended.  \u003c\/p\u003e\n\u003cp data-end=\"723\" data-start=\"497\"\u003e\u003cstrong\u003eQ: What is the difference between Real Display and Smooth Display?\u003c\/strong\u003e\u003cbr data-end=\"566\" data-start=\"563\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eReal Display follows signal changes more directly for a more accurate visual response. Smooth Display offers smoother, steadier movement for better viewing.\u003c\/p\u003e\n\u003cp data-end=\"991\" data-start=\"725\"\u003e\u003cstrong\u003eQ: Why does the display switch to clock mode when there is no audio signal?\u003c\/strong\u003e\u003cbr data-end=\"803\" data-start=\"800\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThis is normal. If no audio signal is detected for about 5 seconds, the display can switch to clock mode. This function can be turned on or off by remote control.  \u003c\/p\u003e\n\u003cp data-end=\"1316\" data-start=\"993\"\u003e\u003cstrong\u003eQ: How should I power the VFD253 Pro?\u003c\/strong\u003e\u003cbr data-end=\"1045\" data-start=\"1042\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePlease use the included 5V USB power adapter. Do not power it from the same device used as the audio source, as shared grounding may cause background noise or hum.  \u003c\/p\u003e\n\u003cp data-end=\"1316\" data-start=\"993\"\u003e\u003cspan\u003e\u003cstrong\u003eQ: Does the remote control include batteries?\u003c\/strong\u003e\u003cbr data-end=\"95\" data-start=\"92\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No. Batteries are not included for safer and faster delivery. Please prepare compatible batteries separately before use.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: VFD253 Pro\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio Input: RCA \/ MIC Pickup\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio Output: RCA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOperating Modes: 1-in-4-out \/ 4-in-1-out\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDisplay Type: VFD\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDisplay Resolution: 25 × 15\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDisplay Content: Music Spectrum \/ Clock\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDisplay Modes: 7 main display modes with sub-modes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSpectrum Range: LOW \/ MID \/ FULL\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDisplay Response: Real Display \/ Smooth Display\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAdjustments: Brightness \/ Gain \/ Sensitivity \/ Peak Hold\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eClock IC: RX8025T\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTime Accuracy: Within 1 minute per year\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRemote Control: Supported\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePower-Off Memory: Supported\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePower Input: DC 5V \/ ≥1A\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions: 172 × 107 × 70 mm \/ 6.77 × 4.21 × 2.76 in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Dimensions (W*D*H): 200 × 185 × 98 mm \/ 7.87 ×\u003cem\u003e \u003c\/em\u003e7.28 × 3.85 in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet Weight: 650 g \/ 1.43 lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Weight: 980 g \/ 2.16 lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003chr\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* VFD253 PRO\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Power Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* USB-C Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Screwdriver\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Remote Control (Without Batteries)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48640104005864,"sku":"XX-VFD253-PRO-US","price":119.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48640104038632,"sku":"XX-VFD253-PRO-UK","price":119.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48640104071400,"sku":"XX-VFD253-PRO-DE","price":119.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48640104104168,"sku":"XX-VFD253-PRO-AU","price":119.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48640104136936,"sku":"XX-VFD253-PRO","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_1420dda3-9187-4cd3-a92b-1b75045b7455.jpg?v=1781259983"},{"product_id":"douk-audio-eq7-hifi-7-band-audio-equalizer-preamp-w-balanced-xlr-output","title":"Douk Audio EQ7 HiFi 7-Band Audio Equalizer Preamp w\/ Balanced XLR Output","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e7-Band EQ for Custom Sound: EQ7 stereo equalizer lets you tailor sound around your speakers, music and taste. Built for more detailed tone control, it offers seven adjustable bands from 32Hz to 10kHz with ±10dB adjustment to shape bass weight, vocal body and treble detail. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eTrue Balanced XLR Conversion: EQ7 actively converts RCA input into true balanced XLR output with positive and inverted signal phases, bridging classic RCA sources with balanced HiFi amplifiers and powered speakers through a cleaner, lower-noise signal path with better signal integrity.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDual Large VU Meters in Motion: Watch your signal come alive through classic needle movement, adding a retro feel while making music dynamics easy to see at a glance. Brightness, speed and gain controls let you fine-tune the meter glow and response to match your source level and preferred visual style.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFlexible RCA\/XLR Connectivity: Keep DAC, CD player or streamer connected through RCA\/XLR inputs and switch sources without repeated cable changes. Simultaneous RCA\/XLR outputs share the EQ-tuned signal, while the volume knob keeps final level control close at hand.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCompact Aluminum HiFi Build: CNC-machined aluminum front panel, aluminum chassis and gold-plated I\/O connectors give EQ7 a sturdy, refined build with reliable signal contact. Its compact footprint fits easily into desktop, bookshelf or HiFi rack systems, while USB-C power keeps connection simple.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQ: Is the XLR output true balanced?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. EQ7 uses a dedicated circuit to convert the processed audio signal into a true balanced XLR output (with opposite-phase signals), helping to minimize noise and maintain signal integrity.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eQ: Does the EQ7 support simultaneous RCA and XLR output?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. Whether the input is RCA (unbalanced) or XLR (balanced), the signal is processed by the EQ and then output through both RCA and XLR at the same time. The two outputs cannot be switched independently.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eQ: Does the EQ7 have a bypass function?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eA:\u003c\/strong\u003e There is no dedicated bypass switch. However, setting all EQ controls to the center position (0 dB) achieves a near-bypass effect, with no gain or attenuation applied.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eQ: What if the VU meter response is too strong or too weak?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Adjust the VU meter sensitivity and range controls on the rear panel. Fine-tune these settings while playing audio to achieve the desired display effect.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eQ: What power supply should be used?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eA: \u003c\/strong\u003ePlease use the included power adapter. If using another adapter, make sure it is a high-quality 5V DC power supply. Do not use fast-charging adapters, as they may affect performance or cause damage to the EQ7.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eParameters\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eModel: EQ7\u003c\/span\u003e \u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eAudio Input: RCA \/ XLR\u003c\/span\u003e \u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eAudio Output: RCA \/ XLR\u003c\/span\u003e \u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRCA-to-XLR True Balanced Conversion: Supported\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEQ Bands: 32Hz \/ 60Hz \/ 150Hz \/ 400Hz \/ 800Hz \/ 4kHz \/ 10kHz\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eEQ Gain: ±10dB\u003c\/span\u003e \u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eFrequency Response: 20Hz-20kHz\u003c\/span\u003e \u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax Input Level: 1.5Vrms\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax Output Level: 8Vrms (at 600Ω load)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eInput Impedance:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRCA: 50kΩ\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eXLR: 10kΩ\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eOutput Impedance:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eRCA: 10Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eXLR: 100Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMaximum Output Gain: 10dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eVU Meter Adjustment: Range \/ Brightness \/ Sensitivity  \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePower Input: USB-C, DC 5V ≥1A\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W × D × H): 163 × 107 × 82 mm \/ 6.43 × 4.24 × 3.24 in \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Dimensions (W × D × H): 210 × 185 × 100 mm \/ 8.27 × 7.28 × 3.94 in   \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNet Weight: 760 g \/ 1.67 lb\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePackage Weight: 950 g \/ 2.09 lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003ePacking List\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1 × EQ7\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1 × DC 5V Power Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1 × USB-C Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1 × User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48661582446824,"sku":"XX-EQ7-US","price":119.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48661582479592,"sku":"XX-EQ7-UK","price":119.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48661582512360,"sku":"XX-EQ7-DE","price":119.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48661582545128,"sku":"XX-EQ7-AU","price":119.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48661582577896,"sku":"XX-EQ7","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/XX-EQ7_8.jpg?v=1781691298"},{"product_id":"douk-audio-gaming-headphone-amplifier-with-ess9039-dac-chip","title":"Douk Audio Z1 Gaming Headphone Amplifier with ESS9039 DAC Chip","description":"\u003cdiv\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eGaming-Optimized Audio Hub: Enjoy crystal-clear team voice and spatial audio for competitive gameplay. Z1 works seamlessly with PC, PS5, and mobile devices. Also functions as a high-fidelity headphone DAC for immersive music and everyday use.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eHiFi Sound for Everyday Listening: Equipped with top-tier ESS9039Q2M DAC for ultra-low noise, wide dynamic range, and detailed sound reproduction. The 4.4mm balanced output delivers 430mW\/32Ω power with excellent channel separation for demanding headphones. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSupport for Pro-Grade Microphones: Connect dynamic or condenser mics via XLR or 3.5mm jacks, with built-in 48V phantom power. Use physical knobs for real-time mic volume and mute control. Perfect for voice chat, meetings, gaming, karaoke, or content creation.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eUSB Mixing with Voice Return: In USB input mode, Z1 lets you mix audio from USB, AUX, and mic inputs into one stream via the Mix button. The mixed signal is output through headphones, AUX out, and returned to the USB host for monitoring or routing. MIC OUT delivers only your voice.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eTactile Controls with Premium Build: Adjust treble, midrange, and bass with dedicated knobs, and fine-tune sound with 8 selectable DAC filter modes. Clear LED indicators and physical switches make source and mic control fast and intuitive. The aluminum chassis adds a touch of durability and desktop style.  \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp data-end=\"372\" data-start=\"50\"\u003e\u003cspan\u003e\u003cstrong data-end=\"155\" data-start=\"50\"\u003eQ: Why is there no sound from the 3.5 mm output when both 4.4 mm and 3.5 mm headphones are connected?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr data-end=\"158\" data-start=\"155\"\u003e\u003cspan\u003eA: The Z1 only supports one headphone output at a time. When both jacks are connected, the 4.4mm output takes priority. To use the 3.5mm headphone output, please make sure the 4.4mm headphone has been disconnected.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"473\" data-start=\"374\"\u003e\u003cspan\u003e\u003cstrong data-end=\"463\" data-start=\"374\"\u003eQ: Do tone, volume and filter controls simultaneously apply to all outputs on the Z1?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr data-end=\"466\" data-start=\"463\"\u003e\u003cspan\u003eA: Yes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"804\" data-start=\"475\"\u003e\u003cspan\u003e\u003cstrong data-end=\"558\" data-start=\"475\"\u003eQ: Why can't I use the microphone or Mix function when using the Optical input?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr data-end=\"561\" data-start=\"558\"\u003e\u003cspan\u003eA: This is normal. In Optical input mode, the Z1 works only as a DAC. All microphone-related functions (such as Mic input, Mix, and Mic Mute) are disabled in this mode. To use the microphone or mixing features, please switch to USB input mode.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"1106\" data-start=\"806\"\u003e\u003cspan\u003e\u003cstrong data-end=\"877\" data-start=\"806\"\u003eQ: Why is there no microphone sound after connecting the AUX input?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr data-end=\"880\" data-start=\"877\"\u003e\u003cspan\u003eA: Please check whether the AUX cable is fully inserted and confirm it is a 4-pole (TRRS) cable. If a 3-pole (TRS) cable is used, the internal microphone circuit will be shorted and the microphone signal cannot be transmitted.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"1496\" data-start=\"1108\"\u003e\u003cspan\u003e\u003cstrong data-end=\"1197\" data-start=\"1108\"\u003eQ: Why does the connection to my phone keep disconnecting or fail to stay recognized?\u003c\/strong\u003e\u003c\/span\u003e\u003cbr data-end=\"1200\" data-start=\"1197\"\u003e\u003cspan\u003eA: The is usually caused by insufficient power from the PC-USB connection. This may happen when using a phone as the USB audio source or when connecting to a USB port on a computer. Please use a DC 5V\/≥2A external power supply for stable operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eParameters\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBrand: Douk Audio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eModel: Z1\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio input: USB-C \/ Optical \/ AUX \/ 3.5mm\u0026amp;XLR Microphone\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAudio output: 3.5mm \u0026amp; 4.4mm headphone jack \/ AUX\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eChip: ESS9039Q2M\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eMax. sampling rate\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePC-USB: PCM 48KHz\/16Bit\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOptical: PCM 192KHz\/24Bit\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eRated output power\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e3.5mm headphone: 300mW\/32Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e4.4mm headphone: 430mW\/32Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFrequency response: 20Hz-20KHz (±0.5dB)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTHD+N: 0.001%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSNR: ≥110dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMatched headphone impedance: 16-300Ω\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAUX rated output level: 2V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eInput sensitivity\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eAUX: 850mV\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eXLR MIC: 40mV\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e3.5mm MIC: 60mV\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eUSB\/Optical: 0dBFS\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eUSB compatible systems: \u003c\/span\u003e\u003cspan\u003eWindows\/macOS\/Linux\/Android\/iOS\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eTreble\/Mid\/Bass range:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBass:±10dB\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTreble\/Mid:±6dB\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eMixing: \u003c\/span\u003e\u003cspan\u003eSupported (USB mode only)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eMicrophone mute: \u003c\/span\u003e\u003cspan\u003eSupported (USB mode only)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eFilter modes: \u003c\/span\u003e\u003cspan\u003e8 modes\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eInput voltage: \u003c\/span\u003e\u003cspan\u003eDC 5V \/ ≥2A\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDimensions (W*D*H): 160*118*40mm \/ 6.30*4.65*1.57in\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003ePackage dimensions (W*D*H): \u003c\/span\u003e\u003cspan\u003e320*190*80mm \/ 12.59*7.48*3.14in\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eNet weight: 655g \/ 1.44lb\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003ePackage weight: \u003c\/span\u003e\u003cspan\u003e1.51kg \/ 3.33lb\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003ePacking List\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e1* Z1\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* Metal Stand\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* DC 5V Power Adapter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* USB Power Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* USB Data Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* 3.5mm AUX Cable\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1* User Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Douk Audio","offers":[{"title":"Black \/ NE5532 \/ US","offer_id":48710402212072,"sku":"SUC-Z1-H-NE-US","price":219.99,"currency_code":"USD","in_stock":false},{"title":"Black \/ NE5532 \/ UK","offer_id":48710402244840,"sku":"SUC-Z1-H-NE-UK","price":219.99,"currency_code":"USD","in_stock":false},{"title":"Black \/ NE5532 \/ EU","offer_id":48710402277608,"sku":"SUC-Z1-H-NE-DE","price":219.99,"currency_code":"USD","in_stock":false},{"title":"Black \/ NE5532 \/ AU","offer_id":48710402310376,"sku":"SUC-Z1-H-NE-AU","price":219.99,"currency_code":"USD","in_stock":false},{"title":"Black \/ NE5532 \/ China","offer_id":48710402343144,"sku":"SUC-Z1-H-NE","price":219.99,"currency_code":"USD","in_stock":false},{"title":"Black \/ MUSE01 \/ US","offer_id":48710402375912,"sku":"SUC-Z1-H-MUSE-US","price":219.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ MUSE01 \/ UK","offer_id":48710402408680,"sku":"SUC-Z1-H-MUSE-UK","price":219.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ MUSE01 \/ EU","offer_id":48710402441448,"sku":"SUC-Z1-H-MUSE-DE","price":219.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ MUSE01 \/ AU","offer_id":48710402474216,"sku":"SUC-Z1-H-MUSE-AU","price":219.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ MUSE01 \/ China","offer_id":48710402506984,"sku":"SUC-Z1-H-MUSE","price":219.99,"currency_code":"USD","in_stock":true},{"title":"Silver \/ NE5532 \/ US","offer_id":48710402539752,"sku":"SUC-Z1-S-NE-US","price":219.99,"currency_code":"USD","in_stock":false},{"title":"Silver \/ NE5532 \/ UK","offer_id":48710402572520,"sku":"SUC-Z1-S-NE-US","price":219.99,"currency_code":"USD","in_stock":false},{"title":"Silver \/ NE5532 \/ EU","offer_id":48710402605288,"sku":"SUC-Z1-S-NE-US","price":219.99,"currency_code":"USD","in_stock":false},{"title":"Silver \/ NE5532 \/ AU","offer_id":48710402638056,"sku":"SUC-Z1-S-NE-US","price":219.99,"currency_code":"USD","in_stock":false},{"title":"Silver \/ NE5532 \/ China","offer_id":48710402670824,"sku":"SUC-Z1-S-NE-US","price":219.99,"currency_code":"USD","in_stock":false},{"title":"Silver \/ MUSE01 \/ US","offer_id":48710402703592,"sku":"SUC-Z1-S-MUSE-US","price":219.99,"currency_code":"USD","in_stock":true},{"title":"Silver \/ MUSE01 \/ UK","offer_id":48710402736360,"sku":"SUC-Z1-S-MUSE-UK","price":219.99,"currency_code":"USD","in_stock":true},{"title":"Silver \/ MUSE01 \/ EU","offer_id":48710402769128,"sku":"SUC-Z1-S-MUSE-DE","price":219.99,"currency_code":"USD","in_stock":true},{"title":"Silver \/ MUSE01 \/ AU","offer_id":48710402801896,"sku":"SUC-Z1-S-MUSE-AU","price":219.99,"currency_code":"USD","in_stock":true},{"title":"Silver \/ MUSE01 \/ China","offer_id":48710402834664,"sku":"SUC-Z1-S-MUSE","price":219.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_e46e1a79-0923-46a3-9262-c41d8926c4e1.jpg?v=1783405666"},{"product_id":"douk-audio-lab-tx7-vu-meter-audio-spectrum-visualizer-desk-clock-display-decor","title":"[Pre-Sale] Douk Audio Lab TX7 Desktop Display with VU Meter, Spectrum Visualizer \u0026 Clock","description":"\u003cdiv class=\"des\"\u003e\n\u003ch4 class=\"STYLE4\"\u003eFeatures\u003c\/h4\u003e\n\u003cp class=\"STYLE4\"\u003e \u003c\/p\u003e\n\u003cspan class=\"STYLE1\"\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli class=\"STYLE3\"\u003eBring Every Sound into View: Seven VU meter styles turn changing signal levels into smooth, responsive needle motion with a lifelike analog feel, while 2 audio spectrum visualizer modes reveal frequency movement in crisp detail and vivid color. Made for listeners who enjoy watching the signal as much as hearing the sound.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul class=\"STYLE3\"\u003e\n\u003cli\u003eTune Every Visual Response: Choose AUX line input for direct response or MIC pickup for convenience. Fine-tune VU motion with gain, damping, and stiffness, while spectrum mode adds 32\/64-band detail, response curves, real\/smooth response, colors, and peak\/fall timing to match your source and style.  \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul class=\"STYLE3\"\u003e\n\u003cli\u003eTurn Time Into Desk Ambiance: Give quiet moments their own look with 4 clock styles, 2 animated scenes, and 12 static standby screens. From focused work to late-night gaming or relaxed listening, TX7 stays useful as a desk clock and expressive as visual decor, keeping the setup fresh throughout the day. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul class=\"STYLE3\"\u003e\n\u003cli\u003eTouch Control Made Effortless: Swipe between display styles, tap into settings, and fine-tune key visuals with on-screen sliders. The responsive touchscreen keeps every change direct and intuitive, so you can refresh the mood, try a new look, or refine the display in seconds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"STYLE3\"\u003eRefined Style for Modern Setups: Sandblasted anodized aluminum gives TX7 a refined look and solid feel. Vivid motion, retro VU charm, and changing visuals bring personality to any setup, making it a natural desk centerpiece and a memorable gift for music lovers, gamers, and desk setup fans. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\u003chr\u003e\n\u003cbr\u003e\n\u003cp class=\"STYLE4\"\u003ePacking List\u003c\/p\u003e\n\u003cp class=\"STYLE3\"\u003e \u003c\/p\u003e\n\u003cdiv class=\"STYLE3\"\u003e\n\u003cul\u003e\n\u003cli\u003e1 × TX7\u003c\/li\u003e\n\u003cli\u003e1 × Leather Storage Case\u003c\/li\u003e\n\u003cli\u003e1 × 3.5 mm 1-to-2 Cable\u003c\/li\u003e\n\u003cli\u003e1 × USB-C Cable\u003c\/li\u003e\n\u003cli\u003e1 × 3.5 mm AUX Cable\u003c\/li\u003e\n\u003cli\u003e1 × User Manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch4\u003e\u003cbr\u003e\u003c\/h4\u003e\n\u003chr\u003e\n\u003ch4\u003e\u003cbr\u003e\u003c\/h4\u003e\n\u003cp class=\"STYLE4\"\u003eParameters\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"img-text-wrap\"\u003e\n\u003cdiv class=\"text-center\"\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Douk Audio Lab\u003c\/li\u003e\n\u003cli\u003eModel: TX7\u003c\/li\u003e\n\u003cli\u003eAudio Inputs: 3.5mm AUX Line In \/ MIC Pickup\u003c\/li\u003e\n\u003cli\u003eDisplay Resolution: 960 × 320 Pixels\u003c\/li\u003e\n\u003cli\u003eControl Method: Touchscreen\u003c\/li\u003e\n\u003cli\u003eMain Display Modes: VU \/ Audio Spectrum \/ Clock \/ Standby\u003c\/li\u003e\n\u003cli\u003eVU Mode: 7 Styles\u003c\/li\u003e\n\u003cli\u003eAudio Spectrum Mode: 2 Styles\u003c\/li\u003e\n\u003cli\u003eSpectrum Display: 32-Band \/ 64-Band\u003c\/li\u003e\n\u003cli\u003eClock Mode: 4 Styles\u003c\/li\u003e\n\u003cli\u003eClock Format: 12-Hour \/ 24-Hour\u003c\/li\u003e\n\u003cli\u003eStandby Mode: 14 Built-in Screens (2 Animated + 12 Static)\u003c\/li\u003e\n\u003cli\u003ePower Input: USB-C 5V \/ 1A\u003c\/li\u003e\n\u003cli\u003eDimensions (W × D × H): 124 × 23 × 54 mm \/ 4.89 × 0.91 × 2.13 in\u003c\/li\u003e\n\u003cli\u003ePackage Dimensions (W × D × H): 154 × 48 × 110 mm \/ 6.06 × 1.89 × 4.33 in\u003c\/li\u003e\n\u003cli\u003eNet Weight: 348 g \/ 0.77 lb\u003c\/li\u003e\n\u003cli\u003ePackage Weight: 581 g \/ 1.28 lb\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Douk Audio","offers":[{"title":"US","offer_id":48710518767848,"sku":"DZ116-US","price":99.99,"currency_code":"USD","in_stock":true},{"title":"UK","offer_id":48710518800616,"sku":"DZ116-UK","price":99.99,"currency_code":"USD","in_stock":true},{"title":"EU","offer_id":48710518833384,"sku":"DZ116-DE","price":99.99,"currency_code":"USD","in_stock":true},{"title":"AU","offer_id":48710518866152,"sku":"DZ116-AU","price":99.99,"currency_code":"USD","in_stock":true},{"title":"China","offer_id":48710518898920,"sku":"DZ116","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/6995\/9912\/files\/1_82f928d0-ec32-4ed3-9035-f11141c18467.jpg?v=1783414930"}],"url":"https:\/\/doukaudibestseller.com\/en-ca\/collections\/new-releases.oembed","provider":"Douk Audio","version":"1.0","type":"link"}