Holy Samolies! What burst into flames, the amp or the speakers? The amp I presume?!?

Good thing you were in the room when that happened. I've left my systems on while puttering in the yard, or downstairs ... that'd be a rude and dangerous surprise to find your upstairs aflame.

BTW, the Yamaha M80s don't even work up a sweat driving the Thiel CS 3.6's. They are great amps.

Enjoy the Music. Trust your ears. Laugh at Folks Who Claim to Know it All.