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Rare KLH Speakers Research Ten SCX-3A

U

undekon

New Member
Never seen these mentioned anywhere. I am about to finally to replace the foam on the woofers so I thought I would take some pics and show the world what KLH actually did achieve as they declined as a company. I believe this was the top of the line.

The cabinets are nice real walnut veneer. The face is also walnut covered by a nice solid velcro'd on grille. The back is black vinyl. The drivers complement is what makes these stand out. One nice 12 inch woofer, 2 dome midranges, 2 leaf tweeters and 1 dome supertweeter per speaker.

Of all the speakers I have owned they stand as the best balanced covering the most bandwidth. They can rock out with the best of them and be so real on acoustic performances that is sounds like the performer is sitting 10 feet in front of you.

I also have Carver Amazing Speakers, AR-3a's, Rectilinear IIIa's, Cerwin Vega 12-T's and current JBL towers.

It has been a long time but maybe this design ended up in the formation of Infinity speakers? Once re-foamed I will be good to go for another 20 years or so.

Enjoy!
 

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KLH SCX 3-A to repair..in ITALY

Hello i am riccardo from Italy
i have the same KLH that you show us in this post as a gift from a friend of mine that unfortunately trow away the woofers (i knnow is very very sad) instead of repearing the foam!!!
I would like to know any information you have about original woofers as to find the closest replacing i can find: some close pictures.. a scanning of manual, information about the fact that those are 8 OHM speakers and so on...
Do you have any suggestion like a place to go to try to buy oriinal speakers?

I also recently repaired a couple o superb ESB 7/08 and i hope i could do the same in this case...

Thanks in advance

Riccardo
 
I had some research X's that did not look quite like that...those look fantastic. They came stock with the peerless? Some great ideas in that speaker...I read that when the research X's came out they were trying to change the way they were marketing and it didn't work out too well, otherwise that might be an all time speaker.

My research X's were a little shy on bass but the high end was amazing.

I have pics at home.
 
Sir.Byrd said:
Wow those look just like something from the Infinity Quantum line!!!
Click to expand...

Back when Eastman Air Devices owned both Infinity and KLH they tested the reliability of EMITs in the KLH X series (I may have the series wrong) speakers. Infinity had such a bad reputation for reliability the newest thing they developed got tried without their name on it.

These did end up in dozens of Infinity products to come after KLH sold them.
 
Sir.Byrd said:
Wow those look just like something from the Infinity Quantum line!!!
Click to expand...

actually they look like an upgraded baron with the emits after my experience with the little barons i would venture to say they're a keeper
 
Last edited:
kbott said:
actually they look like an upgraded baron with the emits after my experience with the little barons i would venture to say they're a keeper
Click to expand...

Yeah, an extra mid and the two emit-y drivers, plus the woofer looks different.
 
Even stranger results!

Now that I am refoaming the woofers I found out that they are way different. One has a ceramic magnet of decent size and the other has a large steel plated alnico type magnet. Externally they look the same. I will take some pictures tonight and let you look at the results.

I have considered beefing up the woofers. Parts Express has a nice 12 inch model that might fill the bill for around $75. It does have to fit a 12 inch recess exactly!

I have never had any problems with the emit tweeters. As with the Infinity ones soundstage and extension are some of their stong points. The speakers vanish into the room similar to the Carvers.
 
The Research X series had woofers with something called Magnaflux magnets, which was supposed to be an upgrade to standard magnet structures. I've only owned a smaller pair -- the squat 10 inch two way -- but I thought it sounded surprisingly good, so there may have been something more than advertising in the name. On the other hand, KLH, like many companies, was not above changing suppliers and hence drivers during a production run. So your woofers may match well enough anyway.
 
Here are the woofer pictures

They do sound the same! The silver one is far heavier due to the steel encasing the magnet, at least I assume the magnet is inside. I have no way of knowing which speaker came first or why they made the change.
 

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The square one is original. It is a Megaflux (tm) woofer. (I have the literature in front of me) and it is rated to handle a 30hz sine wave @ 200 watts. (Before you all yell at me, that's what the literature says). The speaker is rated to go from 26-33khz (+/- 2db), Minimum 40 watts, 200 max, 90lbs. I don't have them yet, but I am working on a deal with a friend to aquire these, and an SX-1980 Pioneer that has powered them since new. :)
 
KLH Research Model 10 SCX2

Hello-

I'm trying to source replacements for the EMIT's that used to be in my old SCX2, which is a lot shorter than the SCX3A.

Do you know the exact make and model of the EMIT's in your cabinet?
Even better: know where I might find spares?

exdc
 
Just a wild guess that the last four digits on the woofer magnets are date codes... 12/79 on the square, and 09/80 on the round.
 
Very cool speakers. Those date codes sound about right. There is another less-known KLH speaker that looks like a knockoff of a Rectilinear III Highboy.
 
Sorry to revive such an old thread, but I'm trying to find a re-foam kit for the same set of speakers, and am coming up dry. Does anyone know what kit to use for these, and where to get it?

Thanks!
Jon
 
KLH SCX2's

Hi all-

Good speakers (and threads) last a while. My SCX2's lost their EMITs when I had lent them to a former friend - he had thrown the EMITs away (gasp!) and replaced them with some off the shelf crud. Managed to locate the correct original EMITs from magicmarksy on freaky bay, a great deal, worked great until recently. But: they still work, and I've located the problem in the crossovers and the totally junky pots from the 70's. Am going to replace all the electronics there this spring.

Also, re the SCX3's that started this thread: the woofers in my SCX2's are identical to the big heavy square-magnet model that the original poster showed here on page 1.

I have the so-called service manual if anyone needs it: consists only of schematics for each model in the TEN line. Am attaching as a pdf,
 

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