Schematics
Valve/tube designs
Classic 300B power amp.
Dynaco stereo 70
Dynaco Mark 3
Quad 22
Transistor designs
Hiraga MC -Moving Coil preamp
OP-based RIAA preamp
Kaneda Preamp
Hiraga Le Classe A -20W
Nelson Pass ZEN
Nelson Pass ZEN II
Lidström Improved ZEN i
The Lidström Lethal AMP -dead simple!
