Simple and quick question:

What is the recommend power output of an amplifier that will adequately run the 4 ohm M80s? I'm looking at a used NAD receiver that only has 80 WPC X 5 channels. What does Axiom recommend for these speakers to really sing?

I should also ask if someone can help educate me on watt ratings. I fully realize most manufactures give figures that represent WPC at 8 ohms. Is there a conversion for 4 ohms or is it different for each receiver. Secondly, if this NAD is 5 X 80, is that not 80 per channel, thus I'd only get 80 for each speaker?

Any help here would be greatly appreciated.