Just so you know, I am going to buy the M80's this week and I am a little worried the Yamaha won't have enough grunt to run them.

So I thought if I can connect the marantz to the Yamaha to add extra power to the M80's things should be ok.

Ok, is this correct...

if I connect rca cables to the pre-out left and right mains on the Yamaha and then into the left and right speaker terminals on the Marantz?

Can I change the volume via the Yamaha? The Marantz doesn't have a remote.

Thanks again for your help.