How do you solve "popping" when source switching?

I have a Rotel RSP 1068 processor running Innersound Eros MKII speakers through its own bass amp and cross-over and a Proton AA2120 amp for the panels and if I hit mute, or swith from CD to Video 1 and so-on I get a "pop" in my speakers and it happens with both the bass and panels so I know it is not an amp causing this, I sent put my Rotel for service because I thought it was the culprit. A fellow Agon member let me use hos old Carver pre-amp so I could enjoy music and such while mine is out and his does the same thing, so now I wonder what if anything I can do about it.
I am running everything into a Monster 2000 surge/conditioner. The only thing I can be sure of is it had to do with my speakers being very efficient (96db), are there any thoughts or pointers you guys can tell me so I can get rid of this problem, I doubt it is dangerous to the speakers but it is very annoying so please help!
thanks again all in advance...Chad