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Douk Audio NS-14G PRO HiFi 2.1 Channel Bluetooth TPA3255 Amplifier Review

A 2.1-channel amp with two TI TPA3255 chips delivering up to 300W each for left, right and subwoofer, plus QCC304X Bluetooth with aptX/aptX-HD. Dual power sockets and three-sided ventilation keep it running through demanding sessions.

3.73.7 out of 5 starsUpdated October 14, 2026
$134.99Price checked October 14, 2026
Check price at Douk Audio
Douk Audio NS-14G PRO HiFi 2.1 Channel Bluetooth TPA3255 Amplifier

Our verdict

The NS-14G PRO is for listeners assembling a 2.1 system: two TPA3255 chips split the work between stereo speakers and a subwoofer, with up to 300W available for each, and the included 48V/5A adapter means it runs out of the box. Bluetooth aptX/aptX-HD streaming and six control knobs round it out at $134.99. There is no headphone jack and no wired digital input, so plan your sources accordingly.

Best for
Anyone building a 2.1 setup with passive speakers and a subwoofer who wants Bluetooth and plenty of power in one amp.
Skip if
You need a headphone jack or wired digital inputs - this amp offers Bluetooth, RCA and AUX only.
Check price at Douk AudioHow we research

The Douk Audio NS-14G PRO is a 2.1-channel power amplifier priced at $134.99. It is built to drive a pair of passive speakers plus a passive subwoofer from Bluetooth, RCA or AUX sources, making it a compact hub for a desk, studio or living-room system.

Inside are two TI TPA3255 amplifier chips: one handles the stereo channels and the other the subwoofer, for a maximum output of 300W per left/right channel and 300W for the sub. With the equipped 48V/5A power adapter, Douk Audio says it can easily drive most home passive speakers and subwoofers, with a total harmonic distortion of just 0.01% and an SNR of 108dB or better. Bluetooth comes courtesy of the QCC304X chip, supporting aptX and aptX-HD codecs with low power consumption and connectivity that resists dropouts.

Reliability features include dual power sockets - the secondary supply activates promptly if the main one is insufficient or fails, though it needs its own same-voltage supply sold separately - and vents on the sides and bottom to keep operating temperatures down. The front panel offers six adjustments: subwoofer frequency, volume and gain, plus main volume, bass and treble. Inside, Rubycon filter capacitors, Siemens coupling capacitors, a Taiwan fully enclosed potentiometer and full copper shielded inductors contribute to sound quality and longevity.

Douk Audio ships worldwide with free and expedited shipping options at varying cost by country. Packages under 2kg travel by airmail in roughly 10-25 days, while orders over 2kg ship via DHL/UPS/FedEx in about 5-8 days, and any import duties or customs charges are the customer's responsibility. Returns are free within 30 days for a full refund, and every item carries a 1-year warranty. Exclusions cover orders placed by mistake, man-made damage or misuse, a change of mind, and anything outside the warranty terms.

What we liked

  • Dual TPA3255 chips provide up to 300W each for left, right and the subwoofer channel
  • QCC304X Bluetooth with aptX/aptX-HD support for stable, low-power wireless streaming
  • A second power socket can take over when the main supply struggles, keeping playback uninterrupted
  • Ventilation on three sides (sides and bottom) helps hold stable operating temperatures
  • Six control knobs cover subwoofer frequency, volume and gain plus main volume, bass and treble; Rubycon and Siemens capacitors and shielded inductors inside

Worth noting

  • The backup power socket needs a second supply of the same voltage, which is not included
  • No headphone output and no wired digital inputs (USB, optical, coaxial) - connectivity stops at Bluetooth, RCA and AUX
  • Its full output is meant for passive speakers and a passive subwoofer, so active speakers cannot be driven from the speaker terminals

Questions before you buy

Does it ship with a power supply?

Yes, it includes a 48V/5A power adapter, which the maker says is enough to drive most home passive speakers and subwoofers.

What is the second power socket for?

It provides backup power if the main supply is insufficient or fails. It requires a power supply of the same voltage (not included); if you use only one supply, connect it to the main socket.

Which Bluetooth codecs are supported?

The QCC304X chip supports advanced codecs including aptX and aptX-HD, with low power consumption and stable connectivity.

What can I connect to it?

Bluetooth devices, and line-level sources via stereo RCA or AUX; outputs cover banana speaker jacks, an AUX output and a subwoofer output.

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