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

$75.35

TSA7550B is a 200W Bluetooth+DSP mono amplifier board with an AudioB plus Bluetooth module supporting Apt-X. TSA7550B is a very flexible DSP/Amplifier combination board. It has perfect class-D architecture(Based on TDA7498E) with a mono channel capable of a 200W power output. Any DC14V-39V power supply can power this board. It can be used to drive any 3Ω,4Ω, or 8Ω passive speakers. TSA7550B has a smart cooling system, and the fan does not work in normal cases to reduce the noise. The fan starts only when the board overheats.

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

TSA7550B is a 200W Bluetooth+DSP mono amplifier board with an AudioB plus Bluetooth module supporting Apt-X. TSA7550B is a very flexible DSP/Amplifier combination board. It has perfect class-D architecture (Based on TDA7498E) with a mono channel capable of a 200W power output. Any DC14V-39V power supply can power this board. It can be used to drive any 3Ω,4Ω, or 8Ω passive speakers. TSA7550B has a smart cooling system, and the fan does not work in normal cases to reduce the noise. The fan starts only when the board overheats.

It’s a one-channel amplifier board. The only channel is 200W mono output (mixed audio for the right and left channels). 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 the ADAU1701 DSP chip on board. Users can set the audio tones/frequency of the output. The board has the default DSP program loaded. Users can set the amplifier to 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 wirelessly.

External Button port:

Three buttons on the board can control the audio volume, play/pause, etc. Using these button control ports, external buttons can be easily connected.

Pins definition: (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
  • Users can also define this port function by changing the DSP program.

POT Port:

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

DSP Programming Port:

Users can load a new DSP program using the USBi JTAG Sigma DSP programmer.

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

Specifications typical @ +25℃, Powered by 36V DC, unless otherwise noted. Specifications are 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%
220W
Parallel BTL (mono) output
power, RL = 3 ohm, THD = 1%
170W
THD Po = 1 W 0.05%
Bandwidth @ ±3dB @4Ω 20Hz 20KHz
Input Impedance 69KΩ
Undervoltage protection
threshold 
8V
Minimum Load Impedance 3Ω
Gain 23.8dB 29.8dB/33.3dB 35.8dB
Efficiency 85%

Features:

  • 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

Applications:

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

Product Datasheet and Manual

If applicable, the Product Documentation, such as the 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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