4 x 50W SPDIF Coaxial+DSP Amplifier Board - TSA7804C

4 x 50W SPDIF Coaxial+DSP Amplifier Board - TSA7804C
4 x 50W SPDIF Coaxial+DSP Amplifier Board - TSA7804C 4 x 50W SPDIF Coaxial+DSP Amplifier Board - TSA7804C 4 x 50W SPDIF Coaxial+DSP Amplifier Board - TSA7804C
Brand: Tinysine
Product Code: G644780354FA96
Reward Points: 0
Availability: 520
Price: $65.00

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TSA7804C 4 x 50W 4 channels SPDIF+DSP digital amplifier board with a SPDIFBee receiver module. SPDIFBee convert the SPDIF signal to I2S signal and output to the ADAU1701 DSP chip. TSA7804C 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). Power input port can be power jack or screw terminal. The DC input jack is 2.5mm with positive core polarity, And if you use screw terminal, Please pay attention to the polarity!

TSA7804C has a coaxial input connector on the board which can accept different sampling rates digital audio source, from 16bit 44.1KHz to 26bit 96KHz. The highlight point is ADAU1701 DSP chip on board. User can set each channel audio tones separately.


External Buttons port:

Not support this function on TSA7804C.


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/SPDIF 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&SPDIF audio and output to the speakers. User can also change the DSP program to let the audio source selectable by an external switch.



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
  • SPDIF Supported sampling rate:
  • 16bit, 44.1KHz, 48KHz, 88.2KHz, 96KHz
  • 24bit, 44.1KHz, 48KHz, 88.2KHz, 96KHz
  • I2S Sampling Rate: 48KHz, 16bit
  • 4 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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