I can’t believe I don’t know this, but it’s actually never come up for me before. I know that an ABY can switch me back and forth between two amps, or two guitars and one amp. But can both channels function properly simultaneously? Can I plug in one guitar, and run it to two amps at the same time? Or is it only good for selecting one or the other at a time? The only time I’ve run two amp rigs I’ve run them off a stereo chorus or tremolo pedal.