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Nobsound M5.1 5.1 Channel Bluetooth Home Theatre Amplifier Review

Front, surround, center and subwoofer channels in one compact box, with Bluetooth 5.0, optical, coaxial, USB and 5.1 RCA inputs for a mini home cinema rig.

3.73.7 out of 5 starsUpdated October 14, 2026
$169.99Price checked October 14, 2026
Check price at Douk Audio
Nobsound M5.1 5.1 Channel Bluetooth Home Theatre Amplifier

Our verdict

The Nobsound M5.1 is a compact 5.1 channel amplifier for building a mini home theatre without a full-size AV receiver. It drives front, surround, center and subwoofer channels from three TPA3116 chips, accepts Bluetooth, optical, coaxial, USB and 5.1 RCA sources, and can upmix stereo material to surround. At $169.99 it is a lot of channels for the money, but there is no HDMI, the 50W-per-channel output suits small rooms, and a second power supply is on you if you want maximum headroom.

Best for
Small-room home cinema builds that need five channels plus a sub output from a compact, low-cost amp.
Skip if
You need HDMI switching, or you expect discrete 5.1 without a 5.1 channel analog source.
Check price at Douk AudioHow we research

The Nobsound M5.1 is a 5.1 channel digital amplifier priced at $169.99, designed for home theatre and multi-channel music systems. It is aimed at listeners who want a small multi-channel setup without the size or cost of a conventional AV receiver.

Output is handled by three classic TPA3116 chips split across the system: front left and right at 50W x 2, surround left and right at 50W x 2, center at 50W and subwoofer at 50W. Four digital inputs are provided (Bluetooth 5.0, coaxial, optical and U-disk) alongside 2.0 channel and 5.1 channel RCA inputs, so most home audio devices can connect. The U-disk input plays lossless WAV, APE and FLAC as well as MP3. A low-frequency output is included for connecting a second active subwoofer, letting the amp build 2.0, 2.1, 2.2, 5.1 or 5.2 channel systems.

The M5.1 can also create surround from stereo sources: a built-in multi-channel signal processing chip applies dynamic separation techniques to allocate a 2.0 signal across 5.1 channels, with the maker claiming precise sound positioning and a convincing surround effect. A long press of the play/pause button switches between 2.1 and 5.1 output modes without re-plugging speaker cables. On the maker's own advice, a true 5.1 result needs a 5.1 channel RCA input; a 2.0 input sent to 5.1 output is processed and simulated. Controls include main volume, treble and bass, plus separate front, surround, center and bass volume knobs and function indicators. The amp is made of aluminium alloy and runs from a single included 24V/6A adapter, with a second power input available for more output.

Shipping is worldwide, with free and expedited options priced by destination country. Packages under 2kg go by airmail (10-25 days) and anything over 2kg by DHL, UPS or FedEx (5-8 days). Import duties and customs charges are the buyer's responsibility. All items include a 30-day free return or full refund and a 1-year warranty; the exclusions are orders placed by mistake, man-made damage or misuse, a subjective change of mind, and anything else outside the warranty terms.

What we liked

  • Real surround wiring in a compact amp: front, surround, center and subwoofer outputs from three TPA3116 chips
  • Wide input set covering Bluetooth 5.0, coaxial, optical, U-disk and both 2.0 and 5.1 RCA
  • 2.0 sources can be processed and simulated into 5.1 output, and a long press of play switches between 2.1 and 5.1 so speakers never need re-wiring
  • Separate level knobs for front, surround, center and bass make balancing a surround system easier
  • A second power input lets you add another supply for stronger output

Worth noting

  • No HDMI inputs, so consoles and Blu-ray players must connect over optical, coaxial or analog
  • Only one 24V/6A adapter is included; the maker advises adding a second supply for higher output
  • Upmixed surround is processed from a 2.0 signal; discrete 5.1 needs a genuine 5.1 channel RCA input

Questions before you buy

Does the M5.1 have HDMI inputs?

No. Inputs are Bluetooth 5.0, coaxial, optical, U-disk, 2.0 channel RCA and 5.1 channel RCA, so HDMI devices need a separate converter or must connect over optical or analog.

Can it turn stereo music into 5.1 surround?

Yes. A built-in multi-channel processor allocates a 2.0 signal across 5.1 channels. The maker notes this is simulated: for true 5.1 output, use a 5.1 channel RCA input.

How do I switch between 2.1 and 5.1 output?

Long press the play/pause button to switch between the 2.1 and 5.1 output modes without plugging and unplugging speaker cables.

Will one power supply drive all channels?

A 24V/6A adapter is included, which the maker describes as sufficient for most setups, but a second power input is provided and a larger supply is recommended for higher output.

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