2 x 50W Bluetooth and DSP Audio Amplifier Board – TSA7802B Apt-X

$55.50

TSA7802B is a 2x50W Bluetooth+DSP amplifier board with an AudioB I2S Bluetooth module that supports Apt-X. It is a very flexible DSP/DAC/Amplifier combination board. It has perfect class-D architecture(Based on TPA3116D2), and two channels have a 50W power output. All the channels are capable of outputting nominal power simultaneously and continuously. Any DC12V-24V power supply can power this board. It can be used to drive any 4Ω or 8Ω passive speakers.

2 x 50W Bluetooth + DSP Audio Amplifier Board – TSA7802B (Apt-X)

TSA7802B is a 2x50W Bluetooth+DSP amplifier board with an AudioB I2S Bluetooth module that supports Apt-X. It is a very flexible DSP/DAC/Amplifier combination board. It has perfect class-D architecture(Based on TPA3116D2), and two channels have a 50W power output. All the channels are capable of outputting nominal power simultaneously and continuously. Any DC12V-24V power supply can power this board. It can be used to drive any 4Ω or 8Ω passive speakers.

It’s a two-channel amplifier board. 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 “TSA7802B”. You don’t need a PIN; pair it, and then you can play music.

The highlight point is the ADAU1701 DSP chip on board. It has a default DSP program loaded. Customers can adjust the gain, Bass, midrange, and treble in the DSP program. It also has a debug port for Sigma Studio, and the User can program this module with our USBi programmer to get more functions, which include equalization, crossover, bass enhancement, multiband dynamics processing, delay compensation, etc. TSA7802B has Apt-X and TWS supported. Therefore, users can stream audio to 2 paired amplifier boards wirelessly.

External Buttons port: Three buttons on the board can control the audio volume, play/pause, etc. You can connect external buttons easily by using this button’s 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
  • VDD_BT_IO: AudioB I2S 1.8V output

Volume control POT port:

There is an Ext POT port on the board. You can connect external POTs (5K~20K) to control the Main volume, treble, middle, and Bass. You need to update the DSP program first. DSP program (with external POTs). This is our POT kit:

  1. ADC0- Main volume.
  2. ADC1- Bass volume.
  3. ADC2- Middle volume.
  4. ADC3- treble volume.

DSP programming port: Users can load a new DSP program by using the USBi JTAG Sigma DSP programmer

The default DSP program can auto-select the line-in/Bluetooth audio and output to the amplifier chips. The Bluetooth audio signal has a higher priority.

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

  • S1 – Long press 3s into pairing mode. Long press 6s to 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: Unless otherwise noted, specifications are typical @ +25℃, Powered by 30V DC. Specifications are 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
THD+N @4Ω, 1W, 1KHz 0.03%
Bandwidth @ ±3dB @4Ω 20Hz 20KHz
Input Impedance 22KΩ
Minimum Load Impedance 3.2Ω
Gain 18dB 24dB 34dB
Efficiency 50W @ 4Ohm 87% 92%

Features:

  • Size: 10.5cm x 7.5cm x 2.2cm
  • aptX, aptX Low Latency, SBC and AAC
  • Bluetooth 5.1
  • I2S Sampling Rate: 48KHz
  • Two channels
  • Working voltage: DC12V-24V
  • Over/under voltage protection
  • Over current protection
  • Over temperature protection

Applications:

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

Product Datasheet and Manual

If applicable, the Product Documentation such as Datasheet, Brochure, Reference Materials, CAD Design, STP Files, Manuals, and Tutorials will be available for download upon purchase from the My Account as needed. On the checkout page, please create an account to download product-related files upon purchase. You won’t be able to download otherwise.


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Founded in 2009, TinySine Electronics is a smart home and open source hardware provider, catering to hardware engineers, DIY enthusiasts and interactive designers. Our ever-growing product catalog includes over 700 components and widgets from sensors, robotic platforms, communication modules to smart home relay boards.

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