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KLH Six - blown tweeter.

R

RandomHybrid

New Member
Hey All,

I recently pulled out a pair of KLH series 6 speakers I had in storage for a while. I went out picked up a AR XA turntable and when I connected everything to the speakers I realized one of the speakers has a blown tweeter.

From what I have read, this is not an easy fix but thought I'd see what the community had to say. Any advice is appreciated!

Thanks.
 
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It may be something as simple as a capacitor needing replacement, and easy task. Or one of the thin wires under the aluminum grill is broken and in many cases, can be fixed with a careful soldering operation. I would try that before replacing. Check it with a ohmmeter if you have one available. Lots of info here about all things KLH. Here's one thread of many:
http://www.audiokarma.org/forums/index.php?posts/6943884/
 
RandomHybrid said:
Hey All,

I recently pulled out a pair of KLH series 6 speakers I had in storage for a while. I went out picked up a AR XA turntable and when I connected everything to the speakers I realized one of the speakers has a blown tweeter.

From what I have read, this is not an easy fix but thought I'd see what the community had to say. Any advice is appreciated!

Thanks.
Click to expand...
It's easy no matter what the cause, as long as you don't have early 6s
On early 6s the drivers are epoxied to the baffle and the grille is attached, for all practical purposes, in a permanent fashion - they obviously didn't think you'd need to be taking them off anytime soon
 
I'm currently restoring a pair of Six's and replacing the caps. These are the original owners purchased in 1971. All drivers work, and they sounded good. The woofer surrounds were resealed, the cabs freshened up, new caps get installed tonight.
 
2.2uF 250Vdc ClarityCap CSA Series Metalized X2
3.9uF 250Vdc ClarityCap CSA Series Metalized X4

would this work..I couldn't find exacts in partsconnexxion

Sorry to HIJACK thread but it should help the OP
 
Parts express has 2.0uf and 4.0 uf dayton caps as well.

If you're redoing the crossover, you might want to pick up 4x 3ohm and 2x 7.5ohm power resistors. The coil in there is likely fine, but the resistors are inside the epoxy, getting them out cleanly is pretty unlikely based on my recent redo of my 1963ish Sixes.
 
I've restored four different sets of KLH Model Six speakers and I'm working on #5. Haven't encountered a blown tweeter, yet. A dried up old capacitor in the crossover network can sound very much like a dead tweeter.

DIY simple test:
As mentioned earlier - buy or borrow a digital multimeter. You will need to open up the speaker thru the woofer, which is easy unless you have a very early version. Carefully remove the fiberglass inside, and trace the 2 wires going to the tweeter. Most likely they're soldered on the tweeter but usually the wires coming out are connected with a screw cap terminal to the crossover.

Undo the screw terminal, separate the wires, and set the multimeter to measure resistance in ohms. Take a measurement with the multimeter - one wire to each lead. If it is blown, the multimeter will not register anything. If it reads anything (you're hoping + 4.0 ohms) most likely it's fine.

You can buy a new tweeter on ebay, but you must replace the capacitors in the crossover in either case. The difference is substantial.

Beyond that, there are many threads describing the process of restoring the M6. I never get a chance to sell them because my friends hear them and they end up wanting to buy them from me. Simple, great 2 way speakers.

If you need more help, post pics on this thread. We are happy to offer advice!
 
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