PP class A Amplifier
It is 16 watt per channel of pure A-class PTL (Power Transformer Less) PP amp with no feedback. Cascode balanced driver with constant current source.
Ground layout, Speaker & Cables
Non - Oversampling Balanced Retro-DAC
Balanced RIAA Preamp: RetroRIAA 
yury_gl@hotmail.com
Yury Gelgor
Kansas City
Disclaimer:
I can take no responsibility for you making this amplifier work or about electrical safety,
though I can try to answer any of your questions. High
voltage do apply to this amplifier with no transformer, so use caution
when work with this one. I make no money from putting this up here.