A B switch, but not the usual way

I have a pair of front speakers I'm fond of. I have a 5.1 receiver that's good for movies, but not so much for music. Since then I built some tube kits for making music, and I'm very happy with them. My problem is I want to use these speakers in both situations (music and movies, but not at the same time). A guy (experienced-older) at the electronics-pro audio shop, suggested a DPDT toggle switch, which I could easily do. Is this the best way to prevent any errant current from causing problems in the inactive system? And would there be any other concerns to be aware of (noise, loss of signal-Hz)? I know a little but not a lot just looking for a little advice. :eek: