Planar Speaker Asylum

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Planar Speaker Asylum

RE: KLH-9's

73.201.131.109

In Reply to: RE: KLH-9's posted by josh358 on September 29, 2024 at 12:27:38

I owned a pair for many years. Powered by a Futterman H3A, which I still have in storage, the combination was simply magical. The only reason I no longer have them is that rectifier diodes in the voltage multiplier circuit failed twice. The power supplies are encased in wax and I decided I wasn't going to melt the wax out to repair them a third time. The process takes hours and I had enough.

Follow Ups:

RE: KLH-9's - Lew 11:04:41 10/07/24 (0)
I had the same combo for many years. At one point, I was powering two pairs of KLH9s with a Futterman H3aa. I had more than one KLH power supply go bad. A few hours in the oven at about 175 degrees was enough to liquefy the wax, which could then be poured off into a tin foil roasting pan. I did not find the procedure overly tedious. I still have a pan full of the potting wax in my basement. For the past many years I have been listening to Sound Lab full range ESLs powered by an Atma-sphere amp, both of which are heavily modified. OTLs with ESLs since the early 1970s.
RE: KLH-9's - 6bq5 11:46:51 09/30/24 (1)
Quad 67 have a similar construct-
but spacing the components above the PCB and mounting it where air can circulate - and the risk is reduced, and the components last longer...
Happy Listening
- RE: KLH-9's - 6bq5 12:35:42 10/08/24 (0)
  s/b Quad 57
  not 67...
  Happy Listening
RE: KLH-9's - josh358 09:30:33 09/30/24 (0)
What about building a power supply from scratch?

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