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KLH tweeters stopped working

I have a pair of HLH 2 way speakers model AV 3000.  Both the tweeters stopped working at the same time but they are not blown. I removed them and put them in a pair of working speakers and they did not work their either.  The working pair was a different brand does that matter?  Is there a way to fix them or do I need to replace them?  Why would both tweeters go out at the same time?

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Re: KLH tweeters stopped working

Hi, have u first disconnected the tweeters and then checked, as if its on a cross over, the tweeter is in series with a capacitor,if u have a ohms meter or a continuety tester check the tweeter coil if its open,secondly you can have the coil replaced, check if u can get one before buying a new,let me know

Posted on Jan 12, 2008

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I have a pair of KLH AV5001 speakers and I have them hooked up, there is sound but it's distorted and there's zero base, an instruction manual or any advice would be great, thank you.

Without knowing what they're hooked up too.. SOUNDS like your uder powering them, OR over powering them. Look at the back of the speakers the wattage is what your looking for, look at your amp, example: 1000w speaker running on 50w amp = not good.

Jul 05, 2016 | KLH Speakers & Subwoofers

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Tweeter not working

Check the continuity of the removed tweeter with a VOM meter (I use an original Heatkit MM-1 available on eBay for $20) and do the 1.5 volt battery click & scratch test mentioned above.

Celestion A3 tweeters (also used in the A1 and A2 speakers) or the replacement diaphragms are no longer available from Celestion. A1 speakers show up regularly on the United Kingdom eBay website for $300 or less and are small enough to economically ship to the USA. You would also end up with a midrange spare speaker (assuming it is the same as in the A3 cabinets)

The part number for the A series 3 bar tweeter is T4969/P. The 3 bars refers to the 3 bars in the casting to protect the dome. I got this number from the box of my spare tweeter I have the earlier 1 bar castings in my A3's.

Go to do an "artikelsuche" (article search) for the number T4969/P and something extremeley similar shows up except that they list the manufacturer as Onkyo. The part number and description are so similar to what is printed on my spare tweeter box it would be worth 81 euros to see what shows up.
I have designed an adapter plate for either a Scan-Speak Revelator Tweeter D2904/710002 4 ohm, 1" soft dome, 70 mm diameter magnet, $220 or a Vifa D27TG35-06 6 ohms, 72 mm diameter magnet, 91 db, $37.50..Both are available from: in Burbank, CA

I only modeled the front flange of the tweeter to save time. I have not built any of these yet but the price would probably be $400 for a pair of adapter plates and speaker flange modifications. But when you are done you would have replaceable tweeter for a long time to come. The 2 protective bars are drawer handles available for $3 each.

Other possibilities are: voice coil rewinding in the uk voice coil rewinding in australia in Florida can rebuild the woofer and replace the midrange but no longer have the 4 ohm diaphragm for the tweeter.

If you want the drawings (and 3D geometry file necessary for the machinist to make the curved edges) for the adapter plate and tweeter flange modification contact me at

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If you have a Ohm Meter, check the resistance to the speakers. If it is very high, the speakers are burned, (or the crossover is (just capacitors, and If it is close to 4 ohms check the wiring and and at the speakers, most likly the receiver/amp is not blown.

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Hi oddone

You may have a problem with either blown tweeters, or a faulty cross over, or both. If you have a multimeter, you can remove the tweeter, and check it DC resistance. They normally have their impedance marked on the back of the magnet. If not, you can assume they should measure 8 ohms. If they measure open circuit (high resistance), then they have failed.
A good speaker repair guy can often fix an open circuit tweeter as they often break where the very fine wires attach from the voice coil to the terminal. you can take a turn of the voice coil and reterminate to solve this problem. If the voice coils are burnt, they will need to be replaced.
If the tweeter meters ok, then you may have a problem with the crossover capacitors going dry. Generally they are 2.2uf to 6.8uf in value, the smallest cap in the crossover. If the plastic coating on them is split, or they look a different colour to the rest of the caps, replace them, if they sound "hollow" replace em, if you are not sure, replace em. other than that there is not alot more to look for with a speaker box tweeter Good luck and happy listening.

If you have any dramas, get back to me here and we can talk more about it.


Mar 16, 2008 | Speakers & Subwoofers

1 Answer

Installation Help

This means that you have purchased a three piece home theatre system. Two tweeters and a sub-woofer. Assuming you are using a Stereo player (Tape/CD/DVC)you have to connect the Left Output of the Stereo placer to the Left Input at the back of the Sub-Woofer and the Right output to the Right input of the subwoofer by cables. Then take tweeters and connect them to Right speaker and Left speaker output at the back of the sub-woofer ( note if the speakers are marked L/R, then connect them to the subwoofer output accordingly. In case you are using a 5.1 player, then only connect the front right and front left to the Right and Left input at the back of the subwoofer. You are and you can now start playing your music or movies and and you will get theatre quality sound.

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