I've owned 3 pairs of those Quads for a dozen years, and only one panel has failed. Also a HV transformer. They sound great in the stereo room and unbelievable as HT center channel.
Magnepans sound very fine too - but different. And they're a whole lot cheaper and a whole lot more robust. Magnepans do not have a HV supply, and so arcing is NOT a possibility. But it's a good idea to keep them out of the sun or the cement which holds the mylar to the frame will deteriorate.
Magnepans sound very fine too - but different. And they're a whole lot cheaper and a whole lot more robust. Magnepans do not have a HV supply, and so arcing is NOT a possibility. But it's a good idea to keep them out of the sun or the cement which holds the mylar to the frame will deteriorate.