{"product_id":"douk-audio-h7pro-tpa3255-digital-amplifier-w-vu-meter-300w-home-stereo-power-amp","title":"Douk Audio H7PRO TPA3255 Digital Amplifier w\/VU Meter 300W Home Stereo Power Amp","description":"\u003cdiv data-mce-fragment=\"1\" style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eIntroduction\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\" style=\"text-align: left;\"\u003e \u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\" style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eH7PRO is a mini digital amplifier designed by Douk Audio, combining a compact design with exceptional performance. Adopting a TPA3255 amp chip, the power output up to 300W for each channel can effortlessly drive 4-8Ω speakers, delivering impressive sound quality. With single-ended RCA and balanced XLR inputs, preamp RCA output besides speaker jacks output, easily to build multi-channel systems. Two VU meters are added with pointer swinging in real-time with audio signal changes, to get both auditory and visual enjoyment.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\" style=\"text-align: left;\"\u003e\n\u003chr data-mce-fragment=\"1\"\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eFeatures\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eCompact but output strong power: H7PRO features the TPA3255 high-end digital class D amp chip, max power output of per channel can up to 300W, it can effortlessly drive 4-8Ω speakers, delivering impressive sound quality. Its compact size makes it suitable for various applications, from bookshelves and desktop setups to home theaters.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eDual VU meter design and balance control: based on H7 and after collecting lots of helpful advice from our users, H7PRO designed with dual VU meters for left and right channel that dynamically swing with changes in the audio signal. The independent volume control of the L\/R channel is removed and the balance control is added to adjust the balance volume of the left and right speakers for a more even and natural sound.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eDual analog inputs and preamp output: H7PRO combines a minimalist design with exceptional function. Besides standard RCA input, also with a balanced XLR input to minimize interference and reduce noise floor. H7PRO also features its preamp RCA output, another amplifier and active speaker\/subwoofer can be connected to build 2.1 or multi-channel home theater systems.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eAudiophile-grade components and sound: H7PRO adopts Japanese ELNA and Rubycon filter array, professional audio inductors and all-sealed precision potentiometer etc., with an SNR of up to 110dB and ultra-low noise floor to deliver exceptional clarity and low distortion. Traditional design but with enough heat dissipation area to ensure optimal performance and long-time stable working.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eRefined craftsmanship and attractive appearance: CNC-machined, customized all-aluminum alloy construction, ensuring both longevity and a luxurious feel. VU meters to show the volume in real-time, harmoniously combine retro charm with contemporary design, let us experience a HIFI musical journey through time via Douk Audio H7PRO.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\n\u003chr data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\" style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eWarm tips:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e1.The RCA output is pre-amplified, its output level and the speaker jacks output are controlled by the main volume synchronously.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e2.\u003c\/span\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eThere are two sensitivity adjustments for two VU meters on the bottom of H7PRO, one is responsible for the left channel and another is for the right.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\" style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eParameters\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\" style=\"text-align: left;\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eBrand: Douk Audio \u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eModel: H7PRO\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eAudio input: single-ended RCA \/ balanced XLR\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eAudio output: banana speaker jacks \/ stereo RCA\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eMax output power: 300Wx2 (@4Ω)\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eMatched speaker impedance: 4-8Ω\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eFrequency response: 20Hz-20KHz (±0.8dB)\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eInput sensitivity: 2V    \u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eMax output level of RCA: 2V\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eTHD: 0.008%\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eSNR: ≥110dB\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eWorking voltage: DC 24-48V\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eDimensions(W*D*H): 167*126*42mm \/ 6.57*4.96*1.65in\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003ePackage dimensions(W*D*H): 310*240*70mm \/ 12.20*9.45*2.76in\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003eNet weight: 803g \/ 1.77lb\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-family: 'times new roman', times; font-size: 14pt;\" data-mce-fragment=\"1\" data-mce-style=\"font-family: 'times new roman', times; font-size: 14pt;\"\u003ePackage weight ( with 32V power adapter): 1.42kg \/ 3.13lb\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv data-mce-fragment=\"1\" style=\"text-align: left;\"\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\n\u003chr data-mce-fragment=\"1\"\u003ePower Output Table of H7PRO\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e \u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\n\u003ctable style=\"border-collapse: collapse; width: 51.1937%; height: 190px;\" border=\"1\" data-mce-fragment=\"1\" data-mce-style=\"border-collapse: collapse; width: 51.1937%; height: 190px;\"\u003e\n\u003ctbody data-mce-fragment=\"1\"\u003e\n\u003ctr style=\"height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"height: 19px;\"\u003e\n\u003ctd style=\"width: 24.362%; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"width: 24.362%; height: 19px;\"\u003ePower Supply\u003c\/td\u003e\n\u003ctd style=\"width: 22.5934%; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"width: 22.5934%; height: 19px;\"\u003eSpeaker Impedance\u003c\/td\u003e\n\u003ctd style=\"width: 23.4775%; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"width: 23.4775%; height: 19px;\"\u003eRated Output Power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"height: 19px;\"\u003e\n\u003ctd style=\"height: 57px; width: 24.362%;\" rowspan=\"3\" data-mce-fragment=\"1\" data-mce-style=\"height: 57px; width: 24.362%;\"\u003e32V\/5A\u003c\/td\u003e\n\u003ctd style=\"width: 22.5934%; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"width: 22.5934%; height: 19px;\"\u003e4Ω\u003c\/td\u003e\n\u003ctd style=\"width: 23.4775%; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"width: 23.4775%; height: 19px;\"\u003e78W+78W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"height: 19px;\"\u003e\n\u003ctd style=\"width: 22.5934%; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"width: 22.5934%; height: 19px;\"\u003e6Ω \u003c\/td\u003e\n\u003ctd style=\"width: 23.4775%; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"width: 23.4775%; height: 19px;\"\u003e71W+71W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"height: 19px;\"\u003e\n\u003ctd style=\"width: 22.5934%; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"width: 22.5934%; height: 19px;\"\u003e8Ω \u003c\/td\u003e\n\u003ctd style=\"width: 23.4775%; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"width: 23.4775%; height: 19px;\"\u003e65W+65W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"height: 19px;\"\u003e\n\u003ctd style=\"height: 57px; width: 24.362%;\" rowspan=\"3\" data-mce-fragment=\"1\" data-mce-style=\"height: 57px; width: 24.362%;\"\u003e48V\/5A\u003c\/td\u003e\n\u003ctd style=\"width: 22.5934%; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"width: 22.5934%; height: 19px;\"\u003e4Ω\u003c\/td\u003e\n\u003ctd style=\"width: 23.4775%; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"width: 23.4775%; height: 19px;\"\u003e120W+120W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"height: 19px;\"\u003e\n\u003ctd style=\"width: 22.5934%; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"width: 22.5934%; height: 19px;\"\u003e6Ω \u003c\/td\u003e\n\u003ctd style=\"width: 23.4775%; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"width: 23.4775%; height: 19px;\"\u003e110W+110W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"height: 19px;\"\u003e\n\u003ctd style=\"width: 22.5934%; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"width: 22.5934%; height: 19px;\"\u003e8Ω\u003c\/td\u003e\n\u003ctd style=\"width: 23.4775%; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"width: 23.4775%; height: 19px;\"\u003e102W+102W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"height: 19px;\"\u003e\n\u003ctd style=\"height: 57px; width: 24.362%;\" rowspan=\"3\" data-mce-fragment=\"1\" data-mce-style=\"height: 57px; width: 24.362%;\"\u003e48V\/10A\u003c\/td\u003e\n\u003ctd style=\"width: 22.5934%; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"width: 22.5934%; height: 19px;\"\u003e4Ω\u003c\/td\u003e\n\u003ctd style=\"width: 23.4775%; 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