The key is in amp clipping. Very small amplifiers driven into clipping can damage very high-powered speakers. It is like sending little dead shorts to the voice coils, which cause them to heat up and melt down. If the power is clean the M60s will take ridiculous sized amplifiers with no problem. In our power testing we use Bryston 7Bs, which are putting out close to 700 watts. The test involves both modified pink noise continuous for 100 hours at 250 watts followed by another 100 hours of heavy rock and roll. This is way above the standard rating methods of 5 to 8 hours of modified pink noise at the rated power.
