Fosi Audio TB10D Review

Fosi Audio TB10D review featured

This is my review of the Fosi Audio TB10D Class D stereo amplifier (updated version). The TB10D features the Texas Instruments TPA3255 amplifier chip and is rated at 300W per channel. It’s priced at $79.

Disclaimer: This sample was provided by Fosi Audio for an honest review. All observations and opinions here are my own based on my experience with the product.

Fosi Audio TB10D Review
The little Fosi Audio TB10D offers outstanding audio performance at a budget price.
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Confident, clean sound
Good rhythm and dynamics
Tone controls
Lots of power in this little unit
No remote
Some may want more dynamism
Our Score

Fosi Audio TB10D

TB10 design and front panel


With its understated black chassis and matte finish, the TB10D amplifier from Fosi Audio boasts a simple yet sleek design. Despite its budget-friendly price, the case and knobs are crafted from durable aluminium and have a satisfying weight and heft.

The front panel features a power switch, along with treble and bass tone controls and a volume pot – all easily accessible and responsive. Around the back, you’ll find an RCA input and speaker bindings, with posts generously spaced for hassle-free wire connections, particularly with banana plugs.

Inside, the TB10D houses a Texas Instruments TPA3255 amplifier chip, renowned in the audio enthusiast community for its top-notch performance. So don’t be fooled by its affordability – the TB10D is a well-crafted unit.

Rear panel I/O


To put the Fosi Audio TB10D to the test, I paired it with my trusty NHT C3 Carbon speakers and the Topping E70 DAC. The combination was a match made in audio heaven, with the TB10D delivering robust power that left me thoroughly impressed. Even with the volume cranked up, the sound remained clear and near distortion-free.

After some testing, I decided to switch to my Elac B6 Debut speakers, and once again, the TB10D amplifier delivered ample power with ease. Despite its budget-friendly price tag, this amplifier doesn’t skimp on performance, and it’s clear that it can hold its own against more expensive models.

TB10D rear of unit

What sets the TB10D apart is its warm and calm presentation, which belies the powerful sound it’s capable of producing. It’s not the most energetic amplifier out there, but it makes up for that with its smooth, rounded treble notes. This gives it a unique personality that sets it apart from more neutral amplifiers.

One thing to note is that the TB10D isn’t entirely transparent or neutral. It has a distinct character that some listeners may find appealing, while others may prefer a more neutral sound. However, this character is what makes the TB10D stand out from other budget amplifiers and gives it a unique sound signature.

When it comes to soundstage, the TB10D provides a wide and detailed soundstage with good separation and imaging of instruments and vocals. This creates a listening experience that’s enhanced by a greater sense of depth and dimensionality.

Fosi Audio TB10D on desk


In addition to its impressive power and unique character, the Fosi Audio TB10D amplifier offers a level of customization that sets it apart from other budget-friendly models. With the ability to adjust the tonality to your preference, you can fine-tune the sound to your specific tastes.

This level of control is especially useful for those who are particular about their audio setup and want to tweak the tonality. Overall, the Fosi Audio TB10D offers outstanding value and I highly recommend it for anyone building a modest or secondary stereo system.

  • Audio Input: RCA Input
  • Power supply: 32V 5A
  • Power supply voltage range: 18V-48V
  • THD: ≤0.3%
  • SNR: ≥90dB
  • Frequency Range: 20Hz – 20kHz (±1 dB)
  • Input Sensitivity: ≤600mV
  • Terminating Impedance: 2Ω-8Ω
  • Output Power: 300W + 300W
  • Product Size: 166 x 105 x 40 mm
  • Product Weight: 650g

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1 year ago

Could you clarify the unique character that you mention. When you say that it’s not energetic, it’s calm, does that mean it’s flat or compressed? When you say it’s smooth and rounded on top, does that mean the highs are on the soft side? What about the bass, is it tight or mellow? Thanks for clarifying for me.

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