John,
It specifically says in the owner's manual that it will not drive 4 ohm speakers. In the European version of this reciever they had an impedence switch to drive 4 ohm speakers by lowering the current. However, the US version that I have doesn't have this. I wouldn't want to use that option anyway since I would be comprimising sound quality using the impedence switch.
I also, read a review on Crutchfield this past summer about a guy who was trying to drive some in wall 4 ohm speakers with this reciever and he couldn't even get the reciever to drive the speakers at reasonable levels before it went into auto protect mode. This is why I don't think the recievers amps will power the m80's sufficiently. But, it can't hurt to try. I might save $60 on a line level converter and about $650 on the amps.
thanks for the reply
- Nick
