let's see...circuits came from...
tone:
http://amps.zugster.net/articles/tonestacks/
preamp:
http://www.till.com/articles/GuitarPreamp/index.html
balance + volume:
http://sound.westhost.com/pots.htm
as for resistors and caps ..it's what the circuits said.
I thought they were modern audio log pots...
I am still looking for an active tone control circuit but can't seem to
understand what I should be looking for,,,some kind of opamp circuit for
that?
..and since I am not using pickups but condenser microphones, the amp
circuit may have to change a bit.
I don't do electronics math so I have no idea about impedance issues with
the output