This could have been at home here or on the 2-channel forum...
This may sound silly, but I have my reasons!
If you wanted your main speakers for both HT and 2-channel, but did *not* want to use your 2-channel amp for the main HT speakers and wanted to use the HT receiver's internal amp instead, could you use 2 speakers cables to the bi-wire posts of your speakers, jump them together, with one cable pair going to your HT receiver and one to your 2-channel amp? Of course HT and 2-channel would never be used together, but I'm curious if this loop could be harmful to the receiver or 2-channel amp (or the speakers for that matter)?
How's THAT for a run-on sentence!
The other option would be using a switch box. Would that degrade the 2-channel sound?