I recently purchased an Anthem AVM-60 Processor and already had an Anthem A5 amp. My problem is I have 2 faulty channels on my amp so I am using it to power my fronts and center only. I have a couple of good receivers I am not using (Denon & Yamaha). Can a receiver be used to power rear speakers only so I don't have to buy a new amp? My speakers are Sopra No. 2 in the fronts and Bowers 805D3's in the rear. The Sopra's are new so I do not know how they will sound together with the 805's, but I figure it can't be bad. Thanks for any help you can provide.