I'm going to build the impedance switches this wknd and have a few questions:
(1) If I were to leave out the bal/unbal part of the circuit and only build for impedance switching, I can leave out the resistors, right? Their only purpose is to provide hot and cold references to ground in balanced mode?
(2) Is there any performance advantage (sound, health of the amp, etc) in implementing balanced at the OTs rather than at the speakers? If there is an advantage to balancing at the OTs, what value of resistor should be used? Anything in the same 50-100 Ohm range that applies when balancing at the speaker outs?
Many thanks,
Derek