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 architecture(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 to let 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. Features: - 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 Applications: - Personal computer - Background music system - Musical instrument amplifiers - Home DIY - Car audio