Can someone please tell me if the cBus amps auto switch on when they sense an input? I want to use the existing infrastructure of cbus amps and speakers and connect them to a Sonos Port unit instead- one for each of 7 zones. The existing MRA matrix unit and associated programming will be removed. I’m not sure how the amps switch on/off at the moment but if it requires a bus command then I’m screwed- I think?