KLH tweeters stopped working

yes you can. these are called "bi wired" speakers which means there's a hook up for the woofer and the tweeter individually. If your amp have just 2 speaker hookups it's no problem to hook the woofer/tweeter wires of each speaker together. If your amp had 4 speaker hookups, you could put the tweeters in 1 and the woofers in the other but it will still work fine with 2 speaker hookups.

Heating of the power transistor

can be one of the causes.

you may have to take out the complimentary pairs to check.

The pair may take out the drivers and some components along with it.


These may take some time, (troubleshooting)

But have a tech to guide you, if you need to DIY.

Good luck, let us know what you find or needs further assistance.

I think this seller would be a good bet on sourcing the tweeter
http://stores.ebay.co.uk/syclopsshop?_trksid=p2047675.l2563
this might be the actual device you are after
http://www.ebay.co.uk/itm/ACOUSTIC-SOLUTIONS-AV-120-TWEETER-UNIT/121661981566?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20140122125356%26meid%3Dbb27a3ba84474ee9b9806a08c8755be6%26pid%3D100005%26rk%3D1%26rkt%3D2%26sd%3D400927111943&rt=nc

the crossover inside the speaker box maybe burned out take out the woofer and try a diect connection from the woofer to the speaker wire.

You need to replace the tweeter sorry!

check on radio shack maybe there got something that fits your necesities

KLH 900B tweeter specifications: 6 ohm, 40 watts. By the way, KLH's QC for speakers could be improved. One of my 900B tweeters quit because the spacing for the voice coil was way off reasonable tolerance and the body of the speaker coil base pillar (ie: magnitized part) was off-center - and cauesd the coil to ware and short. I contacted KLH but they did not respond.

You have to test them, either should work fine (as in use either pair) if that doesn't work connect one pair at a time and listen for the difference, one pair might be for factory midrange and other for tweeter.. there are two different wiring configurations...

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 resisters...cheap)). If it is close to 4 ohms check the wiring and connectors..to and at the speakers, most likly the receiver/amp is not blown.

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.

regards
Graeme