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Original Message
RE: KLH 9
Posted by garymuffley on February 29, 2016 at 18:27:14:
I have rebuilt several pairs. The panels themselves rarely go bad; a thorough cleaning usually brings them back to full spec. Be careful not to remove any of the blackish coating on the actual mylar panels or you will comprise the performance.
The hassle in rebuilding the speakers is the power supply. Frequently one or more diodes in the voltage multiplier circuit is blown. You have to melt the wax out of the power supply enclosure, which is a royal pain and time consuming. After you make the repair you have to re-melt the wax and pour it back into the enclosure. Very labor intensive.