There are a couple of alternatives. The M200's allow you to pass a trigger command through and on to an additional device, allowing you to daisy-chain a series of amps (trigger from processor to first M200, then from first M200 to second M200, then from second M200 to 750), but there is a limit to how many amps you can place in series like that before the trigger signal is too weak. You can also connect them all to a power strip or power conditioner and switch that strip with the trigger (which is what I do), in which case you leave all of the amps on all the time and just let the power strip cut power when the trigger goes off. If neither of those work for you, the easiest is to leave the trigger between processor and 750 and use the "music sense" option on the M200's - they will come on when they get a signal at their input, and then after there's been no signal for a length of time (I think it's in the neighborhood of 15 minutes) they shut off. All three options will let you stay comfortably on the couch.