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1 x 200W Bluetooth+DSP Mono Audio Amplifier Board - TSA7550B(Apt-X)

1 x 200W Bluetooth+DSP Mono Audio Amplifier Board - TSA7550B(Apt-X)

Precio habitual $68.50 USD
Precio habitual Precio de oferta $68.50 USD
Oferta Agotado
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Antenna Type

TSA7550B 200W Bluetooth+DSP mono amplifier board with an AudioB plus Bluetooth module that supports Apt-X. TSA7550B is a very flexible DSP/Amplifier combination board. It has perfect class-D architecture(Based on TDA7498E) and the mono channel has 200W power output. This board can be powered by any DC14V-39V power supply. It can be used to drive any 3Ω,4Ω or 8Ω passive speakers. TSA7550B has a smart cooling system, the fan not working in normal case to reduce the noise. Only start when the board overheat.

It's a one channel amplifier board. The only channel are 200W mono output(right and left channel audio mixed). You can pair it with a mobile phone or a computer (etc). Power the amplifier board. Use your phone or PC (etc) to search for a new Bluetooth device. The module will appear as "TSA7550B". You don't need a PIN, pair it and then you can play music.

The highlight point is ADAU1701 DSP chip on board. User can set audio tones/frequency of the output. The board has default DSP program loaded. User can set the amplifer to has full frequency or low pass output via switch port. TSA7550B are Apt-X and TWS supported. Therefore, Users can stream audio to 2 paired amplifier boards at the same time wirelessly.


External Buttons port:

There have 3 buttons on the board which can control the audio volume and play/pause ect... You can connect external buttons easily by using this buttons control port.

Pins define:(Check the board backside silkscreen):

  • P/P: Play pause button
  • VOL+: volume increase and forward button
  • VOL-: volume decrease and rewind button
  • 1.8V

Switch port:

Open: Low frequency output

Close: Full frequency output

User can also define this port function by change the DSP program.

POT port:

User can connect an external 10K potentiometer to control the audio volume.

DSP programming port:

User can load a new DSP program by using the USBi JTAG Sigma DSP programmer




2 boards work in TWS mode. You can also build a wireless subwoofer system.


  • S1 - Long press 3s into pairing mode. Long press 6s clear the pairing info.
  • S1+S2 - Long press 1s into TWS slave mode.
  • S1+S3 - Long press 1s into TWS master mode.
  • S2+S3 - Long press 1s disconnect TWS connection.



Specifications typical @ +25℃, Powered by 36V DC, unless otherwise noted. Specifications subject to change without notice.

Parameter Condition Min Typ Max

Supply Voltage (VDC)

- 14 36 39
Power output Parallel BTL (mono) output
power, RL = 3 ohm,THD = 10%
Parallel BTL (mono) output
power, RL = 3 ohm, THD = 1%
THD Po = 1 W   0.05%  
Bandwidth @ ±3dB @4Ω 20Hz - 20KHz
Input Impedance - - 69KΩ -
Undervoltage protection

Minimum Load Impedance



Gain   23.8dB 29.8dB/33.3dB 35.8dB
Efficiency   - 85% -



  • Size: 14.3cm x 9.2cm x 2.8cm
  • aptX, aptX Low Latency, SBC and AAC
  • Bluetooth 5.0
  • Mono output
  • Working voltage: DC14V-39V
  • Smart cooling system
  • Over/under voltage protection
  • Over current protection
  • Over temperature protection



  • Personal computer
  • Background music system
  • Musical instrument amplifiers
  • Home DIY
  • Car audio


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