I have a pair of ESL 63 USA pro monitors. The right speaker is making a popping noise when it is powered 'on' even with no signal to it. Does this indicate that one of the panels may be blown?
I'm not sure if this applies to you, but I've owned Acoustat speakers that had this problem. I redirected the way that the wiring comes out from the panels to the transformers and the problem was solved.
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