Nobsound 100W Subwoofer Digital Power Amplifier – Mini Desktop Amp (Black)

Meet the NS-03G, a compact sub power amplifier designed to drive a passive subwoofer with clean, dependable power. Built around a robust TPA3116D2 chipset, this mini amp packs enough punch to complement a dedicated sub with tight, controlled bass. It is not designed for active or powered subwoofers, nor for ordinary speakers, so pairing it with the right speaker setup helps avoid mismatch and confusion at the listening position.

The form factor matters: the small, rugged shell is meant to sit on a desk or beside your sub, making it easy to integrate into a living room, studio, or workstation. A smooth, tactile volume control knob gives you precise feedback as you dial in the right balance between bass and the rest of your audio.

Core capabilities

• 100W high power powered by the TPA3116D2 architecture for strong bass presence
• Smooth volume control knob for precise, repeatable tuning
• Ultra compact, solid shell that fits on a desk or alongside a subwoofer
• 3.5mm AUX input enables quick connections from phones, CD players, TVs and more
• External power supply required (not included); options include a high quality external supply

Power and compatibility

Power is supplied externally, giving you flexibility to choose a supply that matches your setup. We recommend a robust 12 to 24V supply with at least 4A. For those who prefer an off-the-shelf option, the 19V power supply offered by Nobsound (ASIN: B074J81XRB) is available as an alternative.

Setup and real world use

Connecting is straightforward: connect your audio source to the 3.5mm AUX input, wire your passive sub through the amplifier, then attach a suitable external power source. Start at a low volume and gradually increase to find a balanced bass warmth that suits your room and listening habits.

In daily use, the NS-03G can help you achieve fuller low end in compact spaces where you want a sub that integrates with the rest of the system rather than dominating the sound. The tiny footprint lets you place it on a desk or shelf right next to the sub, enabling quick adjustments without a crowded rack.

What you can connect

• Passive subwoofers matched with appropriate impedance
• Source devices such as phones, CD players, or TVs via the 3.5mm AUX input
• Desktop or shelf setups thanks to the mini size and sturdy construction

Installation checklist

• Choose a compatible passive sub and verify impedance
• Connect the audio source to the AUX input
• Attach the external power supply (12-24V, ≥4A recommended)
• Power on and adjust the volume for the desired bass balance

Technical notes: the NS-03G uses the TPA3116D2 module for dependable power delivery. The 100W rating reflects peak capability when paired with the correct supply and speaker. Remember, this amp is intended for passive subs and is not meant to drive active subs or standard loudspeakers by itself.