I have a similar issue, I use a Parasound 5-channel amp for my HT, but a Bedini 50/50DE for 2-channel; I simply use banana plugs at the end of each run of speaker cable that goes from my amps to my [B&W] speakers (Monster Powerline 2 for HT – Kimber 8TC for 2-channel). When I want to listen to music, I plug in the Kimber from the Bedini, HT, the Powerline 2 from the Parasound. It is a little cumbersome, but gets the job done.