Patwho
Since you are running m80's, you may benefit from an external amp to power your front speakers. You didn't mention that when watching a movie or listening to music that your receiver is shutting down, but the receiver may be limiting the current. If the receiver is limiting the current then your m80's aren't sounding as good as they could. Onkyo's are supposedly famous (or infamous) for this current limiting according to Alan. If it were me I would get an external amp if I were driving m80's with the Onkyo 705. You don't have to go crazy and buy a 5 or 7 channel amp, I think just a couple Outlaw monoblocks would be more than enough. But, if you ever have your receiver shut down (going into protect mode) then you definitely need to get an external amp to power the m80's.
- Nick
