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2 x 50W + 100W 2.1 Channels Bluetooth+DSP Amplifier Board - TSA7800B(Apt-X)

2 x 50W + 100W 2.1 Channels Bluetooth+DSP Amplifier Board - TSA7800B(Apt-X)

Precio habitual $66.50 USD
Precio habitual Precio de oferta $66.50 USD
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Antenna Type

TSA7800B 2x50W + 100W 2.1 channels Bluetooth+DSP amplifier board with an AudioB I2S Bluetooth module that supports Apt-X. TSA7800B is a very flexible DSP/DAC/Amplifier combination board. It has perfect class-D structure (Based on TPA3116D2) and 2 channels have 50W power output and another one channel has 100W power output. All the channels are capable of outputting nominal power simultaneously and continuously. This board can be powered by any DC12V-24V power supply. It can be used to drive any 4Ω or 8Ω passive speakers(Subwoofer channel can drive 2Ω speaker).

It's a 2.1 channels amplifier board. That channel for subwoofer are 100W mono output(User can change the DSP program and make it becomes right or left channel). 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 "TSA7800B". 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 each channel audio tones separately.  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

Aux in enable port:

The default DSP program can mix the RCA/Bluetooth audio and output to the amplifier chips. If you want to select the RCA/Bluetooth manually by a switch,you can connect an external switch to this port and load a different 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

The onboard default DSP program will mix the RCA&Bluetooth audio and output to the speakers. User can also change the DSP program to let the audio source selectable by an external switch.


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 30V DC, unless otherwise noted. Specifications subject to change without notice.

Parameter Condition Min Typ Max

Supply Voltage (VDC)

- 12 21 24
Power output per channel RL= 4Ω, 10% THD+N   50W  
RL= 8Ω, 10% THD+N     30W
RL= 4Ω, 10% THD+N 18W    
100W channel: RL= 2Ω, 1% THD+N     100W
THD+N @4Ω, 1W, 1KHz   0.03%  
Bandwidth @ ±3dB @4Ω 20Hz - 20KHz
Input Impedance - - 22KΩ -

Minimum Load Impedance




Gain   18dB 24dB 34dB
Efficiency 50W @ 4Ohm 87% - 92%



  • Size: 13.5cm x 9.2cm x 3.4cm
  • aptX, aptX Low Latency, SBC and AAC
  • Bluetooth 5.0
  • I2S Sampling Rate: 48KHz
  • 2.1 channels
  • Working voltage: DC12V-24V
  • 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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Customer Reviews

Based on 1 review
Thomas Stündel
One of the best small digital amps

I own 10-20 digital amps. The first ones i soldered on my own 15 years ago.
But this one is one of the best amps for small budget. It sounds great. I bought the second one directly from tinysine. This was delivered quickly wihin 3 weeks to germany. I use the amp with an old laptop power supply and some extra capacotors.
Maybe i buy an third one within this year.