https://www.altronics.com.au/p/k5528-currawong-2x10-watt-stereo-valve-amplifier-kit/
Made me an offer I couldn't refuse ..
Silicon Chip Online Issue - November 2014
Silicon Chip Online Issue - December 2014
I buy these to build the speakers with these drivers.
DAEX58FP
A Pi Audio Hat
https://core-electronics.com.au/raspberry-pi-iqaudio-dac-pro-48159.html
Raspberry Pi IQaudio DAC Pro
SKU: CE07563
https://www.max2play.com/en/2016/01/raspberry-pi-zero-with-iqaudio-dac/ https://www.sparkfun.com/products/17738
May be look to using existing Red Red Pi hub and esp 32 as the I2C slave.
https://esphome.io/components/media_player/i2s_audio.html
https://electronics-diy.com/pcm5102-burr-brown-dac-with-dir9001-spdif-receiver.php
