Hm, that is a big problem... An A/B/Y switch to go into the two heads would be the first thing you'd have to do. I'd imagine you'd have to have another one with a line out from the head, into one part of the 2nd A/B/Y, and have both heads plugged in like that, with the Y going out to the cab.

Thats really all that I can imagine you'd be able to do with that, but we'll see what everyone else has to say.

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