Hifitime
I sure do appreciate the concern, I must say I've some reservations... with my mono blocks at least.
My butler TDB 5150 apparently has some built in safeguards so that amps which are energized yet not connected to a speaker load are safe.... well so far anyhow. I use it as a 3 ch amp for HT and use the other two ch as a 'change of pace' amp for stereo listening with a better preamp being attached to it. In each case though, Ive got to move two pair of spkr wires from either the Butler to the Dodds or vice versa
and its pretty tight back in behind that rach and gear.
As all the electronics I use are in an adjacent room, save for the speakers, sub and projector & screen, Id have to go into that room to push the button to make the switch over from one set of amps to another set
so theres that
I suspect if prior to that procedure I energize the Dodds I could be in trouble
so Id wait
push the Niles button and THEN energize the Dodds.
The obvious concern then, is the switching mechanism inside the Niles box of course, and if theres any chance at all of some shorting or feeding back, taking place.