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Nobsound NS-01G MAX Mini Bluetooth Power Amplifier 2.0 Channel 100W+100W Review

A super-mini TPA3221 amplifier rated up to 100W+100W under a 24V/8A supply, with Bluetooth 5.0 and AUX inputs and a pre-out for subwoofers, active speakers or a second amp.

3.63.6 out of 5 starsUpdated October 14, 2026
$39.99Price checked October 14, 2026
Check price at Douk Audio
Nobsound NS-01G MAX Mini Bluetooth Power Amplifier 2.0 Channel 100W+100W

Our verdict

The Nobsound NS-01G MAX is a tiny amplifier with a big spec sheet for $39.99: TPA3221 output up to 100W+100W (24V/8A), Bluetooth 5.0, AUX in, and a pre-out that makes 2.1 subwoofer setups or multi-room linking easy. Protection circuits and an aluminum case round it out. Just know the bundled 19V adapter yields 30W+30W — the full 100W rating needs a beefier supply.

Best for
Tiny desktop or shelf systems, 2.1 setups with a powered sub, or turning passive or active speakers wireless on a small budget
Skip if
You expect the full 100W output from the bundled 19V adapter, or you want to plug headphones into the pre-out
Check price at Douk AudioHow we research

The Nobsound NS-01G MAX is a mini 2.0-channel power amplifier priced at $39.99. It is built around the TPA3221 chip, rated for up to 100W+100W, and is designed to drive 3-8 ohm bookshelf speakers rated between 20 and 120W from a chassis measuring 78x70x23mm.

Wireless and wired input options cover the basics well: Bluetooth 5.0 offers a stable connection at 10-15 meters for phones and tablets, while a 3.5mm AUX input handles CD players, DACs and sound cards. The amp also works as a Bluetooth receiver, which means it can add wireless playback to non-wireless active speakers.

Its PRE OUT adds useful flexibility — a 3.5mm jack output that can feed a powered subwoofer for deep bass in 2.1 channel setups, or connect to audio receivers, amps and active speakers for multi-channel surround systems, upgrading stereo speakers into a theater-like experience. Volume control is smooth and precise, with a real-time dual-color LED indicator, and the circuit includes overheat, overload and short-circuit protection in a durable aluminum alloy case with good heat dissipation.

One power caveat matters: the maximum 100W+100W output is specified under a 24V/8A supply, while the optional bundled 19V adapter delivers an output of 30W+30W. The amp accepts DC 9-24V via a 5.5x2.5mm plug, so higher-voltage supplies raise the ceiling. Also note two connection rules: the PRE OUT does not support headphones, and AUX input has priority — unplug the AUX cable to use Bluetooth.

Shipping is worldwide with free and expedited options, and cost varies by country. This amp is light, so it ships airmail in an estimated 10-25 days unless expedited service is chosen. Import duties and customs fees are the customer's responsibility. Free 30-day returns with a full refund and a 1-year warranty apply to all items, excluding orders placed by mistake, man-made damage or misuse, subjective change of mind, and anything else outside the warranty terms.

What we liked

  • TPA3221 output reaches 100W+100W when fed 24V/8A, driving 3-8 ohm bookshelf speakers rated 20-120W effortlessly
  • Doubles as a Bluetooth receiver, breathing wireless life into non-wireless active speakers
  • The 3.5mm PRE OUT enables 2.1 setups with a powered subwoofer, or connection to receivers, amps and active speakers
  • Tiny aluminum alloy case (78x70x23mm, 240g) with overheat, overload and short-circuit protection
  • Versatile placement options — the maker notes it also integrates with motorcycle, car and marine audio systems

Worth noting

  • The headline 100W+100W rating requires a 24V/8A supply; with the default 19V adapter output is 30W+30W
  • The PRE OUT is designed for active subwoofers, active speakers or amplifiers — it does not support headphones
  • AUX input has priority, so the AUX cable must be unplugged to use the Bluetooth input

Questions before you buy

How much power does the NS-01G MAX really deliver?

The TPA3221 chip provides a maximum of 100W+100W under a 24V/8A supply. With the default 19V power adapter, output is 30W+30W. It accepts DC 9-24V via a 5.5x2.5mm plug.

What can I connect to the PRE OUT?

The 3.5mm PRE OUT is designed to connect an active subwoofer, active speakers or amplifiers — it does not support headphones.

How do I use the Bluetooth input?

The AUX input has priority, so unplug the AUX cable if you want to use Bluetooth input.

What are the shipping and warranty terms?

Worldwide shipping with free and expedited options; light orders ship airmail in about 10-25 days. Import duties are the customer's responsibility. Free 30-day returns for a full refund and a 1-year warranty apply, excluding orders by mistake, misuse, change of mind and anything outside the warranty terms.

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