That particular model should be able to run a 4 ohm load with ease. When I was looking at Denon receivers a while back I noticed that they only rated their 2 channel amps at 4ohms. The last time I checked their higher end models were rated 6-8ohms but they are able to handle a 4ohm load. The M80's are pretty efficient so it should be fine.
I would not however run a 4ohm load on Denons low end entry level models.
Last edited by Dr.House; 11/17/0807:41 PM.
I’m armed and I’m drinking. You don’t want to listen to advice from me, amigo.