Since I haven't destroyed my Utopias yet, I can't completely answer your question. I can state that I've driven them HARD and LOUD and they just sit on my head doing what they should do, sound awesome. I would try to give them, and every headphone or speaker you have, very clean sound driven by an amplifier with sufficient power. Its the clipping coming into the transducer that is the most dangerous.
Yeah I definitely always run them as clean as possible I have a Schiit Gungnir Multibit and Mjolnir 2 both plugged into a Furman power conditioner and an Ifi Ican Pro as well. Stream everthing in Tidal HiFi. Dunno if that means something is wrong with my cans or not but it is annoying that others don't have this issue and I do. I bought them new but from a fellow headfier so I am not original purchaser and therefore I assume no warranty is transferred either which is kinda makin me wish I had just spent a little extra money and got them through a dealer.
Any input or recommendations are much appreciated. thanks guys