2 Channel Class D Power Amplifier

Bass you can feel, a mid-range that is crisp and clear, and a high that is sharp and precise. Fosi Audio products deliver exactly what you need to hear without fail.

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The Fosi Audio TB10D is a class D amplifier designed to give you the most bang for buck. This amplifier features an ultra-compact design with a maximum power output of 600W, making it perfect for small sound systems or 2 channel stereo systems.

Mini amp - As big as 
you want it.

You will enjoy the remarkable improvement an amplifier can bring to your sound. Music is now big, bold and live

The Best Sounding Class D Amplifier

Easy to install Class-D audio amplifier. Ideal for building home audio sound system. Designed for high quality audio output with RCA input connection.

The High-Performance Audio Amplifier

True to its word, the TB10D delivers masterful performance with excellent power efficiency. Packing a powerful TPA3255 chip, this amplifier can drive your speakers with ease.

Audio Input

RCA Input 


Output Power

300W + 300W 


Terminating Impedance



Frequency Range

20Hz – 20kHz (±1 dB) 








Input Sensitivity



Power supply voltage range



Power supply

32V 5A 


Product Size

166 x 105 x 40 mm 


Net Weight


Fosi Audio TB10D Measurements


Frequently asked questions

Have questions? We’re hereto help

1: What type of speakers work best with TB10D Amplifier?

  • TB10D works great with any 2-8 G passive speakers.

Note: please know that the TB10D amplifier is for passive speakers, not for powered speakers and subwoofer.

2: Why does the TB10D make serious noise when used together with a radio?

  • A common feature of Class D power amplifiers is that they can cause serious noise when used with a radio, so we do not recommend using the TB10D with a radio or too close to it.

3: Can I connect a turntable to TB10D amp, why is the volume is extremely Low?

  • As for the turntables do not have a built-in preamp, you need to add an external phono preamp before connecting TB10D.
  • As for the turntables which have a built-in preamp, you need to switch the preamp on before connecting TB10D.

4: Why does my power indicator not light up?

  • Please check that the AC power cord is securely connected to the power supply and to an AC power outlet.
  • Please check that the AC power outlet is supplying power, make sure the power LED on the power supply will stay on.
  • Please replace another power supply and try it 18-48V DC power supplies are suitable.
  • If you make sure the power supply is defective, please contact us for exchange.

5: Why does the sound is cracking or make a lot of electric noise?

  • Please make sure all the cables completely pushed into the devices, incompletely connection will cause this cracking.
  • Please remove all the inputs then check whether cracking noise disappear or not, the cracking maybe from the audio source or input cables.
  • If you are not using the original factory standard power supply, please replace the power supply before testing. Many power supply in the market have large interference coefficient, which will cause a lot of current sound.

6: Can I use headphone with this product?

  • No, the TB10D cannot be connected to headphones and only supports passive speakers.

7: Why there is no voice from my amplifier?

  • Please check whether the cable of power supply is connected to TB10D and whether the power indicator is on.
  • Make sure the TB10D's indicator light is on when the power is turned on.
  • Please check that the TB10D and your source components are turned on and not set to minimum volume, if possible replace your source and test again.
  • Check that the wire connections from the audio source to each speaker in the amplifier are connected correctly.
  • Please check that the cable is not loose, Incomplete connection is one of the main reasons for no sound.

8: How much power does this use in standby mode? Can this amp be left on all the time?

  • This is the class D amplifier, it will cost very low power when it is in standby mode. It can be connected all the time and it is safe without power consumption.

9: Sound quality is not good?

  • Make sure all the cables are fully connected.
  • Adjust the treble and bass control of the power amplifier to achieve the right tone.
  • Please try to change the sound source and cables to test.

10: Should I unplug the power cord?

  • If the item will not be used for a long time, please unplug the power plug to prevent the item from being burnt due to lightning strike.

11: Can I bridge channel 1 and channel 2 to get 600watts?

  • NO, this amplifier can't be bridged.

12: How can I connect TB10D to TV?

  • Because the TB10D has an RCA input, it can be connected to a TV.

13: Will I be able to turn up the volume using my TV controller or will I need to adjust the volume manually?

  • Technically speaking the TV's remote control does not control the volume of the amplifier and adjusting the volume of the amplifier requires the manual use of the amplifier's volume control buttons, but the size of the signal from the TV to the amplifier will ahect the sound output of the amplifier.

14: Why the sound cut in and cut out?

  • Try to reduce the sound of the sound source.
  • Try to change the audio source to test.
  • Reduce the volume of the treble and bass knob on the TB10D.
  • Ensure that the positive and negative poles of the speaker output do not touch together. Some relatively large banana plugs are easy to touch together and cause a short circuit.


Comparison Chart


User Instructions