What is it?

This is a 100W per channel PWM DAC with an ADAU1452 DSP chip, and an input board with an ESP32.

Performance parameter PWM DAC:

Output power: 100 W per channel, with a 32 V supply and R load = 4 Ohms.
Speaker impedance: 4 - 8 Ohm (2Ohm – max 50W)
Frequency response: 20Hz - 20kHz
THD: less than 0.005% on 8Ohm load, and less than 0.01% on 4Ohm load
SNR: 106dB(A)
Spdif Input : 16-32bit 44.1-96kHz
Spdif Output : 16-32bit 44.1-96kHz
I2S Input : 16-32bit 44.1-192kHz
Power supply: DC 12V - 32V/ 5A-10A
Consumption power: Idle mode 10W, sleeping mode 2.5W
Efficiency - 80%

Why did you make it?

This DAC was designed to implement a fully digital active three-way loudspeaker.

What makes it special?

This is a power PWM DAC with local feedback on the PWM signal. Each channel uses its own TAS5352A chip in PBTL mode. Feedback on the PWM signal allows you to get quite acceptable measured values ​​for the implementation of a digital active three-way speaker system with good performance. The DAC contains a DSP ADAU1452 that receives a signal via a SPDIF or I2S channel, after adjustable digital signal processing, the DSP transmits it to the amplification circuit via the I2S bus. This power DAC allows you to get rid of double signal conversion for its amplification in class D amplifiers. Which has a positive effect on the final result. More complete and detailed information about the capabilities and methods of using this DAC can be read on the forum at the link below. 3Way DSP Amp