RE: KLH model Six

Posted by Bold Eagle (A) on July 10, 2012 at 10:01:41

In Reply to: RE: KLH model Six posted by DavidLD on July 9, 2012 at 10:06:34:

David,

That comment about the mid-tweeter is really the key. Kloss explained his philosophy in the Advent brochure; and designed his own tweeter to pull off a 1 kHz crossover. The KLH 6 & 17 were both precursors to the Advent; but their tweeters are more conventional and rely on that perforated front plate for dispersion and both use a 1.5 kHz crossover.

Circa 1970 there really were not any tweeters around that could cross over that low (1 kHz) and survive. The Heil AMT could; but that came later and wouldn't fit in a bookshelf cabinet. Later, some others came along that could survive; but most used a higher order crossover to protect the tweeter (third order in the Advent 5002, at 1500 Hz). Hafler used a 1.5" tweeter in the A25 to get enough power handling for a simple high pass filter.

More recently,the Morel MDT 20 and the SEAS 27TBFC/G and 27TDFC work well in a first order 2-way with a 1.5 kHz crossover. I have two systems with 27TBFC/G tweeters and a simple crossover (a 12 uF cap and an L-pad). One uses the SEAS 25F-EW woofer (coated version)in a 38 liter ported cabinet, and the other is a converted New Advent. They sound very much alike with minor differences in the mids and a little difference in the low bass. Both sound very similar to a pair of PSB B15 mini-monitors I have; except for the low bass, of course.

I think Kloss was right about 2 ways, and now I'm on my own 2-way kick. I really like the older woofers that have smooth rolloffs at the top of their range. (Advent, EPI/Epicure, early Genesis, Bose, Bozak, some AR's, some JBL's, Dynaco A25/35 etc.) They work really well with the SEAS tweeters I mentioned above.

Jerry

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Follow Ups Full Thread

Topic - KLH model Six - Neff 14:42:42 07/07/12 (8)

Those plus a Philips receiver ... - ToddM 10:48:40 07/10/12 (3)

OT: Philips Receiver - Brian Levy 13:56:39 07/23/12 (1)

Never seen one again since I got mine - ToddM 09:23:37 07/24/12 (0)

OT: Philips Receiver - Brian Levy 13:56:01 07/23/12 (0)

RE: KLH model Six - rickl 10:59:33 07/09/12 (0)

RE: KLH model Six - DavidLD 10:06:34 07/09/12 (1)

RE: KLH model Six - Bold Eagle 10:01:41 07/10/12 (0)

RE: KLH model Six - Mossback 00:45:58 07/08/12 (0)

Follow Ups

RE: KLH model Six - Bold Eagle 10:01:41 07/10/12 (0)

RE: KLH model Six

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