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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
 
The reading was about 30. The speakers are in a windowless room with air-con set on timer. What are the signs of high humidity affecting the panels?
ct0517's avatar
ct0517
2,041 posts
 
Your readings are really low (really dry)
One of my Wayne Picquet 57's a couple of years back in higher humidity started to make a crackling sound that would cycle on and off. It would make the noise for about 20 seconds and stop. And repeat.
It could be heard between songs if 5 or 6 feet from the speaker. It did not affect performance.
In talking with Ken at Electrostatic Solutions higher humidity is to be avoided. This is especially true for the 63's the most vulnerable. The 57's are very hardy compared to them. Not sure of its effect on 2905's.
Now whether the humidity being too low can also cause any adverse effects I don't know. Maybe someone else can chime in.
I keep the humidity around 50'ish or lower in winter and no symptoms anymore.
acbc
38 posts
 
It's more than likely a panel and not the power supply. It's going to have to go in for an eval and repair. Unless, your plan is to repair it yourself.

There's a handful of quality repair shops out there. A simple google search will return the usaul shops.

Good luck
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