Planar Speaker Asylum

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RE: Spraying weeds and KLH Nine's

Posted by garymuffley on March 5, 2021 at 11:35:31:
It depends on the condition as to how much work is involved. Remove the back covers and cloth screen to access the panels. The panels are easily removed. Clean each panel of any gray or black residue and remove any dust. Check the voltages on the tweeter and each bass panel. This will require a HV probe for your voltmeter. The DC supply should be about 1KV for the tweeter and 5.5 KV for the bass panels. If the dc voltages are significantly below those figures, one or more of the voltage multiplier diodes has failed. The hard part is melting the wax out of the power supply boxes to access the diodes, which requires putting them in your stove until the wax melts.

A fully operational pair of KLH Nines is a revelation; more transparent than the Quads and more detailed; more alive sounding. Better bass with no fear of overdriving them. I used a pair for 20 years.