Hi George. When I run amps in stereo, I usually use an A-B-Y box at the end of the pedal chain. That gives me the option of A 9left), B (right), or Y (both). If you're using a specific stereo pedal, as in a chorus, delay, etc., you can sent the split signals out to the amp from that pedal. You can put whichever pedals you'd like either before that pedal (pedals effect signal to both amps simultaneously), or mixed in after the signal is split (to color only one amp. Hope this is some help.