I use a 400 watt McIntosh amp that is powered by a 7 gage Pangea 9SEMkii power cord that can really deliver current to this amp, in fact, they work so well together, I have forgotten to turn the volume down and really got hit with loud music and never had an issue with the woofers or the tweeters. If you play it louder than what I've heard god bless you, but another thing to consider perhaps your amp was not able to drive the M3 at the levels you enjoy that could cause a tweer to fry. So to hear this happened to you, but I must say the M3's can play loud, much louder than I could listen to for a long period of time. Rule#1 each recording sounds right at one loudness level, once I get a feeling they are in my room with weight and presences I back off the volume a touch or turn it up a touch and see which setting sounds the best, once I hit it I sit back and enjoy this fine speaker.