Help Needed for Old Horns

Looks ike it could be a homr built SpeakerLab K-Horn clone. They came with the T35 (i will confirm that they have those).

The XO parts are crap. Once you sort it, you should strat there. If you went to an active DSP XO you could implement suffiicent time delay to much better line up the 3 drivers in time.

dave
 
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This ad have way more pictures.

Speakerlab K-Horns...clones of the Klipsch Kornerhorns - 1980 - V Efficient - Impressive For Sale - Canuck Audio Mart

1572724-bc3e6df2-speakerlab-khornsclones-of-the-klipsch-kornerhorns-vintage-diy-built-but-very-well-done-sound-good-v.jpg


Factory XO is slicker.

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dave
 

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I had factory SpeakerLab K ~1973 or 74. A good clone - plywood not as nice as Klipsch. Atlas PD4 (?) midhorn driver, fresh Dyna MKIII, mod PAS. SL's K400 clone was very well made and a heavy casting.

I'd try to clean and salvage those L-pads, rebuild with Dayton steel core inductor for the woofer.

Reviews say Cebo caps (at Meniscus) are decent and relatively low priced. One of my K-horns has Russian metallized paper in oil charge coupled MBGO caps - sound pretty nice.

DSP and tri-amping could work wonders on focus, but the classic K-horn sound isn't too shabby.
 
Sweet! Other than that crazy crossover you have a very nice speaker. :up:
Much good advice in the thread. Like Cal, I suspect woofer sag and/or surround rot. I also suspect the L-pads (volume controls) will be dirty and scratchy. Invest in new ones, or get some contact cleaner in a spray can.

With thorough and methodical checking, cleaning and rewiring you can bring these back to life. You might have to spend some money on parts but it will be worth it.
 
I would search out the more modern XO. But given the broad range of drivers used you may need to revise it.

The XO you propose is as simple as possible to minimize damage but i expect it is far from extracting the potential of the loudspeaker.

Step one is to pull the woofer and fix th esurround or replace it.

dave
 
here's how a K-horn w. K33 spec looks without its 2.5mH inductor.

The OP should go to Klipsch, register, then ask at Technical/Modifications forum - lots of info.

fwiw I use the simple "Type A" network - but with battery-biased MBGO Russian caps.

Klipsch used a 2.5mH choke and an autoformer in what's now known as "Heritage series". Those same two
items were used in Heresy, Cornwall, Klipschorn/La Scala/Belle. Later K-horn such as with Type AB network
used a 4mH choke and 125-132 uF shunt cap to pull the basshorn's upper range up a bit. (by pulling more current
from voltage source amplifiers)

I don't know what can be done past the simple network to improve quality. It would take measurements. Some compression
drivers with simple phase plugs would exhibit a 8-9 KHz peak on the K400 midhorn, and a properly tuned LCR (no R in this case) trap would tame that peak. (That peak acted as a 2md HF spatial source)

qkhxFRh.jpg
 
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