Sandro;
I built a sound recording studio in my basement and made all the circuits to one phase. It helps reduce noise in the system. Also, If I had my guitar pluged into A phase and started messing with effect equipment on B phase it could introduce THD and sometimes even a little zing if I was touching my strings and grabed another guitar. Plus I would not use fluorescents or dimmers because it introduces noise and static like a radio receiver. Mostly I would try to keep the A/C and heavier loads on one phase and the elctronics on another of course trying to balance the whole panel. If heavy equipment starts up when electronic equipment is on it could cause fluctuations. I'm not a PRO with any of this but I tried to follow basic principles I read up on.
~Andy
