Amer, the specs for the Cambridge A500 are 65 watts rms @ 8ohms, and 85 watts rms @ 6 ohms, with speaker impedance rated at 6 - 16 ohms. When purchasing my gear from Audioshop, the staff (including Marc) said the A500 should have no problem driving the M80's ("an easy 4 ohm load"). However, I decided to play it safe and go with the M60's, along with the fact that the M80's may have been a bit of overkill for the size of my listening room. I've since added a Cambridge P500 power amp, and Dahlquist sub to my system...sounds real sweet!
Cheers.
