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Nobsound NS-20G Mini Bluetooth 5.0 Digital Amplifier and Headphone Amp, 100W+100W Review

A two-in-one mini amp: two TPA3116 chips drive 100W x 2 into speakers while a 3.5mm jack handles 15-32 ohm headphones, with Bluetooth 5.0 + DSP reaching 15m and a dynamic volume LED display.

3.73.7 out of 5 starsUpdated October 14, 2026
$55.99Price checked October 14, 2026
Check price at Douk Audio
Nobsound NS-20G Mini Bluetooth 5.0 Digital Amplifier and Headphone Amp, 100W+100W

Our verdict

The NS-20G stacks two TPA3116 chips for 100W x 2 into speakers and adds a 3.5mm headphone jack for 15-32 ohm cans, making it one of the more flexible tiny amps at $55.99. Bluetooth 5.0 with EDR and DSP covers a 15m range cleanly, and the simultaneous speaker and headphone outputs let you build a 2.1 setup with an active subwoofer. Match it with 5-8 inch, 20-120W speakers and a 60W-plus supply, and it will behave.

Best for
Listeners who want a tiny amp for speakers and low-impedance headphones in one box, with an easy 2.1 subwoofer upgrade path.
Skip if
You use high-impedance headphones, or your speakers are outside the 5-8 inch, 20-120W window.
Check price at Douk AudioHow we research

The Nobsound NS-20G is a mini Bluetooth digital amplifier with a headphone output, priced at $55.99. It measures 78 x 90 x 23mm and weighs 160g, and its dual role suits both home and desktop use: drive passive speakers through banana jacks, or plug headphones into the 3.5mm jack.

The amplifier section uses two TPA3116 chips for a rated output of 200W total, 100W per channel, enough to drive most home speakers. The headphone section is more specific: it supports only 15-32 ohm headphones, which covers typical earbuds and portable models but not studio high-impedance cans. One clever feature is that the speaker and headphone outputs can work at the same time, so connecting the headphone output to an active subwoofer while the speaker jacks feed passive speakers builds a 2.1-channel system that greatly enhances bass.

Wirelessly, the NS-20G runs Bluetooth 5.0 with EDR and DSP for real lossless-style transmission over a 15m range, with no audible noise. Bluetooth and AUX inputs cover the usual sources: smartphones, TVs, players, computers and tablets. The front panel carries a multifunction decoding knob and a dynamic volume LED display, set into an integrated aluminum case with crystal speaker jacks, available in black, silver, gold, blue and red.

Douk Audio attaches a firm compatibility warning: the NS-20G is only suitable for 5-8 inch, 4-8 ohm, 20-120W speakers, and using mismatched speakers may result in poor sound as well as over-heat and over-load protection that can cause lag, power-off or even damage. Power input is DC 12V-20V above 60W, with a 19V power supply in the variant that includes one.

Douk Audio ships worldwide with free and expedited options, and the cost varies by destination country. Packages under 2kg go by airmail (10-25 days); heavier orders ship via DHL, UPS or FedEx (5-8 days). Import duties or customs charges are the buyer's responsibility. The store offers a 30-day free return or full refund and a 1-year warranty on all items, excluding orders placed by mistake, man-made damage or misuse, subjective change of mind, and anything outside the warranty terms.

What we liked

  • Speaker amp and headphone amp in one small case, with Bluetooth or AUX feeding both
  • Because the speaker and headphone outputs work simultaneously, a powered subwoofer plus passive speakers make an easy 2.1 system
  • Bluetooth 5.0 + EDR + DSP achieves lossless-style wireless transmission over a 15m range with no audible background noise
  • 100W x 2 from dual TPA3116 chips drives most home speakers, with a multifunction decoding knob and dynamic volume LED display
  • Five fashionable color options and an integrated aluminum case with crystal speaker jacks

Worth noting

  • The headphone amp section only supports 15-32 ohm headphones, so high-impedance cans need a different amp
  • Douk Audio specifies 5-8 inch, 4-8 ohm, 20-120W speakers; mismatched speakers may cause poor sound, overheating and protection shutdowns
  • Power input is DC 12-20V above 60W, and the 19V supply is only in the variant that includes it

Questions before you buy

Can I use it as a headphone amp?

Yes, through the 3.5mm jack, but only 15-32 ohm headphones are supported. The speaker and headphone outputs can work simultaneously.

How do I build a 2.1 system with it?

Connect an active subwoofer to the headphone output while the speaker jacks drive passive speakers; since both outputs run at once, the sub adds bass to the system.

What speakers should I pair with it?

Douk Audio specifies 5-8 inch, 4-8 ohm, 20-120W speakers. Mismatched speakers can cause overheating and protection shutdowns.

What is the return and warranty policy?

Douk Audio offers a 30-day free return or full refund and a 1-year warranty. Exclusions include orders placed by mistake, man-made damage or misuse, and subjective change of mind.

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