Pre-amp cables of different length? Or not??

Nrchy, I am vertically bi-amping with 2 channel amps. (MC352)

One amp for the left speaker, one amp for the right.

Then bi-wiring the speakers, so each driver has its own channel and speaker cable feeding it.

This way, however, requires me to feed each amp with two interconnects from the pre-amp so both channels of each amp are essentially dedicated to either the left side or the right side of the music. I leave it to the speaker crossovers to sort it out from there.

Newbee...you hit it right on the head. Ever think of becoming a psychologist?

Jbatlanta- There is a much more economical soltn. Just parallel the inputs buy soldering a jumper across them. If you are not sure how to do it, first check with the manufacturer to make sure there is no unusual circuitry involved; if not and you're still not sure how to do it, have any repair shop do it for you. I had it done by SMcAudio when they moded my amps to Rev A, and I ran them vertically bi-amped, biwire, just as you describe. There, I just saved you at least a kilobuck (or maybe 2, those suckers are way out of my reach)!!! You're welcome ;~)

Jbatlanta - Buy equal length cables. Otherwise you will never be able to sell them when you get the urge to try something new.