piviot point? where ? more like 3 db of differential gain when you use single ended input and balanced output (high gain mode) worse in low gain mode. there is a way to do this correctly, and you only need a couple of super cheap extra parts. hint: a real differential input, like say the one on the kgss
power switch as all the other switches are cheap parts, and the power switch failed shorting one side to ground blowing the house circuit breakers. also for places where the thing is wired for 220v, only one side of the mains is switched. fake on left, real thing on right
other side of the switch is used to dump the output relays on turnoff, and there is no protection circuit from dc, just a 1 minute delay timer
even the magni 2 uber is better than this piece of shit. at least its a balanced vas stage.
here is the updated final schematic
http://gilmore.chem.northwestern.edu/sj.pdf
and yeah the 4 diodes around the opamps are missing from the schematic, i'm lazy