The Quads are limited to a maximum of 32 volts. Anything over that will arc the treble panels. I have had a Bryston 100 watt amp and the solid state Quad amp. They can all arc the speaker if you are not careful. I just don't listen at a loud level anymore so it is not a problem. My biggest concern is if the amplifier is not stable enough at low impedances. An amp that is not very stable can take out both the speakers and itself. The amp I have is voltage limited to 32 volts. This amp is showing it's age and is two channel so I thought I would explore a multi-channel option.