• Powerful Subwoofer Amplifier: Compact but mighty, the NS-21G is a 100W mono amplifier designed for passive subwoofers and bass shakers. Featuring the efficient TPA3116 Class D amplifier chip, it delivers strong and clean bass for home theaters, desktop systems, and gaming rigs.
• RCA & AUX Input for Wide Compatibility: The NS-21G supports both RCA and 3.5mm AUX inputs, making it easy to connect with TVs, phones, tablets, computers, CD players, and streaming boxes. Its dual-input design ensures the subwoofer amp integrates smoothly into almost any home audio system.
• One-Knob Simplified Control: Easily power on and adjust the output level with a single knob. The NS-21G integrates volume and power into one smooth dial, giving you instant control over your subwoofer output level without altering your main system settings, ideal for movies, games, and music.
• NE5532 Op-Amp for Clearer Bass: Powered by the well-known NE5532 op amp, the NS-21G delivers smooth and detailed low-frequencies with low distortion and minimal noise. It’s a reliable choice that improves bass clarity for everyday listening, movie nights, or gaming sessions.
• Compact, Durable & Built for Bass Lovers: Designed in a robust all-metal case, the NS-21G is durable enough for long-term use and compact enough to fit on any desktop or shelf. Ideal for gamers, audiophiles, and home cinema lovers who need more punch in their low-end without sacrificing space.

• Brand: Nobsound
• Model: NS-21G
• Audio input: RCA/3.5mm AUX
• Audio output: Subwoofer out
• Number of channel: mono
• Chip: TPA3116
• Op-amp: NE5532
• Rated output power: 100W
• THD+N: 0.04%
• SNR: ≥103dB
• Bass cutoff frequency: 20-160Hz
• RCA input sensitivity: 0.775V
• Matched speaker impedance: 4-8Ω
• Working voltage: DC 12-24V (5.5*2.5mm)
• Dimensions (W*D*H): 90*105*30mm / 3.54*4.13*1.18in
• Package dimensions (W*D*H): 205*180*55mm / 8.07*7.08*2.16in
• Net weight: 325g / 0.72lb
• Package weight: 700g / 1.54lb

User Manual of Nobsound NS-21G