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Douk Audio NS-13G MAX HiFi Mini 2-Channel Amplifier with Phono, 300W x 2 Review

A compact TPA3255 power amp with a built-in MM phono stage, so a turntable can plug straight in. It ships with a 48V/5A adapter for up to 300W x 2 into 4 ohms, and adds tone/bypass switching plus a swappable op-amp.

3.63.6 out of 5 starsUpdated October 14, 2026
$114.99Price checked October 14, 2026
Check price at Douk Audio
Douk Audio NS-13G MAX HiFi Mini 2-Channel Amplifier with Phono, 300W x 2

Our verdict

The NS-13G MAX is a smart pick at $114.99 for vinyl fans building a small system: a TPA3255 amp with 300W x 2, a genuine MM phono input and an included 48V/5A supply in a compact aluminum case. The tone/bypass switch and pluggable op-amp socket give it enthusiast appeal, and the AUX output makes subwoofer integration easy. Moving-coil cartridges and digital sources will need their own converters.

Best for
Turntable owners who want a compact amp with a built-in phono stage and enough power for real speakers.
Skip if
You use a moving-coil cartridge, or you need Bluetooth, digital inputs or a headphone jack.
Check price at Douk AudioHow we research

The Douk Audio NS-13G MAX is a mini 2-channel stereo amplifier priced at $114.99. It pairs the TPA3255 amplifier chip with a built-in MM phono stage, letting turntables connect directly alongside stereo RCA sources, and it ships with a 48V/5A power adapter ready to power typical home passive speakers.

Power output reaches a maximum of 600W total (300W x 2) into 4 ohms, with matched speaker impedance of 4-8 ohms and a total harmonic distortion of 0.005% at 1kHz. SNR is 107dB or better and the frequency response spans 20Hz-20kHz within plus or minus 1dB. Input sensitivity is 5mV for the phono input and 2V for RCA, feeding banana speaker outputs plus a 3.5mm AUX output rated at 2.4V, which can connect another amplifier or active speaker and subwoofer for a 2.1 or multi-channel setup.

Enthusiast details abound: a tone/bypass switch lets you fine-tune bass and treble (plus or minus 6dB) or take the tone circuit out of the path completely, and the NE5532P op-amp sits in a pluggable socket that accepts dual op-amps such as OPA2604, OPA2134 or MUSE02. Rubycon and WIMA capacitors are used throughout, heat is managed by side and bottom vents that also keep dust out, and the CNC precision-cut aluminum case with a metal DC outlet is compact enough for desktop use. The maker notes that the AUX and speaker outputs are controlled by the same volume and tone knobs, and that if you want even more power than the 48V/5A adapter provides, a larger high-quality adapter is your own project.

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

  • Built-in MM phono input lets a turntable connect directly without a separate phono stage
  • TPA3255 amplifier chip with the included 48V/5A supply for up to 300W x 2 into 4 ohms
  • Tone and bypass switch: shape the sound, or bypass the tone circuit entirely for pure unprocessed audio
  • Pluggable NE5532P op-amp socket accepts upgrades like OPA2604, OPA2134 or MUSE02
  • Side and bottom vents dissipate heat while preventing dust build-up; compact CNC aluminum case suits a desktop

Worth noting

  • The phono stage is MM only - moving-coil cartridges are out of scope without an external step-up
  • The 3.5mm AUX output and speaker jacks share the main volume and tone controls
  • No Bluetooth, no digital inputs and no headphone jack - this is a pure analog speaker amplifier

Questions before you buy

Can I plug a turntable directly into it?

Yes - it has an MM phono input with 5mV sensitivity, so a moving-magnet turntable connects without a separate phono stage. MC cartridges are not supported.

Does it come with a power supply?

Yes, a 48V/5A power adapter is included; for even higher output the maker suggests preparing your own larger high-quality adapter.

What is the bypass switch for?

It turns off the tone preamplification, so the audio signal passes through unprocessed when you want pure, uncolored sound.

Can I connect a subwoofer?

Yes - the 3.5mm AUX output can connect another amplifier or an active speaker/subwoofer to build a 2.1 system, with the same volume and tone controls applied.

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