or at leat the midrange drivers seem to have done as all I'm getting is a very trebly weak sound from each speaker. My guess is that the supplied cables at 20 mtrs long and very thin indeed are the culprits. Cant see its the amp ( HK PS650) as its plenty powerful enough wih plenty of current too- (they drive my 4ohm Kef Duette quite comfortably) .. I never played them loud either so its a complete mystery to me??