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About dxho

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    AR speaker listing: http://www.aphenos.net/electronics/speakers/klh/all_ar.htm

    KLH systems listing: http://www.aphenos.net/electronics/speakers/klh/all_klh.htm

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  1. I think it's quite an accomplishment! Thank you for detailing the process. You might be the first person, to my knowledge, who did so. I think a couple of reasons (and probably others, no doubt) for no response: there is one person, maybe two, who are now offering repair services here, and there's finally a reasonably close-in-sound aftermarket replacement available. Nevertheless, I may finally drag out the dead tweeters I've been hanging onto for several years and see if they can be revived.
  2. They were made from ~'71-'76. Yours would appear to be early in that range. What requires knowing their age?
  3. Production started apprx 3/58, so probably not too long after that.
  4. Here's a listing of the early KLH products I pulled together. The one at the top of this thread has a lot of mistakes. http://www.aphenos.net/electronics/speakers/klh/all_klh.htm
  5. Looks like they were sold from 1989-91 Features treated paper woofer and liquid-cooled tweeter; direct-coupled woofer; dual-density baffle; frameless grille; acoustic-suspension enclosure. Walnut or black-ash woodgrain vinyl finish. Power handling 10-60 W; frequency response 65-25,000 Hz, -3 dB; sensitivity 90 dB; impedance 8 ohms. 14 x 7-1/2 x 7-3/8 in; 9 lb. 4 oz $289/pr
  6. Lots of folks out there happy to sell you new drivers, but you probably don't need them. The foam surrounds can be replaced, at considerably less cost. And if some are bad, all of them need to be done. I wouldn't run the speakers at all. Too easy to damage drivers that need surrounds.
  7. Earliest instance of which I'm aware is the KLH Model Four tweet, ~1958.
  8. I know at least one other person here who might get a kick out of some KLH ephemera... 🙂
  9. There's a (recently) considerably cleaned up index in Library Additions and Corrections.
  10. That would be my guess. But it suggests you may not have a crossover wired up, and running straight amp power to the tweeter could blow it. My suggestion is to remove at least the woofer and follow the wiring to see what's up.
  11. I had some 406s. As I recall, they only had a two-terminal plate on the back. Your looks like woofer, midrange, tweeter, and common.
  12. Early on, KLH said their speakers could handle more or less any amp available to the buying public. I have a pair of Model Ones that will get painfully loud without apparent strain. Yes, you'll need to cut the grilles off to put sealer on the woofer surrounds. It might get the bass back.
  13. 1989 Stereo Review buyer's guide listing Acoustic-suspension floor-standing liquid-cooled speaker with solid-pecan top and base with wraparound grille. Features 10" high-excursion cone woofer with aluminum-coil form; 1" ferrofluidfilled soft-dome tweeter. FR 42-23,000 Hz ± 3 dB; min power 100 W rms; max power 500 W peak; sens 88dB sPL/W/m; imp 8 ohms. Black texture vinyl finish over dense fiberboard. 46.5 lb; 28.25" h x 16" w x 9.75" d $399/pr
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