4 x 50W Bluetooth+DSP Amplifier Board – TSA7804B(Apt-X)
TSA7804B 4x50W 4 channels Bluetooth+DSP amplifier board with an AudioB I2S Bluetooth module that supports Apt-X. TSA7804B is a very flexible DSP/DAC/Amplifier combination board. It has perfect class-D architecture(Based on TPA3116D2), and four 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. The power input port can be a power jack or screw terminal. The DC input jack is 2.5mm with positive core polarity, And if you use a screw terminal, Please pay attention to the polarity!
You can pair it with a mobile phone or a computer etc. Power the amplifier board. Use your phone or PC to search for a new Bluetooth device. The module will appear as “TSA7804B”. 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 each channel’s audio tone separately. Apt-X and TWS supported. Therefore, Users can stream audio to 2 paired amplifier boards at the same time wirelessly.
External Buttons port:Â 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 the pause button
- VOL+: volume increase and forward button
- VOL-: volume decrease and rewind button
- 1.8V
Aux in enable port:Â The default DSP program mixes the RCA/Bluetooth audio and output to the amplifier chips. If you want, 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:Â Users can connect an external 10K potentiometer to control the audio volume.
DSP programming port:Â Users can load a new DSP program using the USBi JTAG Sigma DSP programmer.
The onboard default DSP program will mix the RCA&Bluetooth audio and output to the speakers. Users can also change the DSP program to let the audio source be selectable by an external switch.
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 30V DC, unless otherwise noted. 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 | |||
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 | 3.2Ω | |||
Gain | 18dB | 24dB | 34dB | |
Efficiency | 50W @Â 4Ohm | 87% | – | 92% |
Features:
- Size: 13.5cm x 9.2cm x 3.4cm
- aptX, aptX Low Latency, SBC, and AAC
- Bluetooth 5.0
- I2S Sampling Rate: 48KHz
- Four 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
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