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Quad Esl 2905 reliability issues?

I have owned a pair of Quad 2905 for six years problem-free. These are my favorites amongst the high end speakers I have owned so far. But lately one of the panel start to buzz and pop 30 minutes into my listening session. Does it mean that I have panel failure? I am puzzled because I am sure I did not over-drive the speaker.
mvp100
mvp100 OP
4 posts
 
Correction. " one of the panels start to buzz and make audible popping noise after they have been turned on for 30 minutes or more"
tomcy6's avatar
tomcy6
2,551 posts
 
Mvp, I am not an expert on Quads but I have read that the panels can arc or short even if they are not abused. It seems to be a fairly common problem with them.

Maybe someone more knowledgeable can help you out.
johnsonwu
469 posts
 
Panel would be expensive. Try checking replacing the input bipolar lytic and the small 0.1uf cap somewhere midway between input and the panels. Sorry I forgot. Been too long. That fixed my 989.
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