JBL L26 - bad crossover?

[cjpremierfour]

I called the local repair guy and someone reassured me that crossover repair would be about $75. But then I drove over there and his wife tried to tell me it was going to be $170 for the pair. I'm now very crabby, having spent $75 for a pair of replacement tweeters that doesn't solve the problem.

I hope to try this pot cleaning but I think after that I'm about spent on these speakers. I'm fairly attached to them because they were my father's and I heard lots of good music on them for the first time. I'm nearly out of patience, though.

I'd like to be able to isolate the problem and make sure of a couple of things
* The tweeters are OK and not blown
* If it's the crossover, it's a dirty pot and not some other component.

Any tips would be most welcome. The crossover seems really hard to get at -- you can't open the back of the cabinet and removing the woofer sounds like a real chore. I can reach in and feel the crossover if I take the tweeters out, but I can't see anything. Advice welcome. I'm nearly at the end of my rope. For the time and money I'm spending, I could probably have purchased some old klipsch KG4's.

No, Do not use WD40. Use need to clean electricial contacts ( Your Pot ) using isopropyl alcohol or another type of contact cleaner.

To test your tweeters: remove your tweeters, use a good know source of audio or a 1.5 volt battery
Connect your tweeter to the positive / negative sides of your receiver wires with the volume all the way down and your bass control all the way down ( below flat to take away bass ) SLOWLY turn up your volume control until you hear audio. ( DO NOT PLAY TOO LOUD or TOO LONG, just make sure it works and stop )
You can also use a 1.5volt household battery by hooking up a wire on both end and touching your tweeters terminals. They should click with every touch which would tell you the voice coil is not open.

You L26's crossover has (2) inductors, (1) 8UF capacitor and the (1) potentiometer per speaker. $75 per speaker is a complete robbery and you should avoid this guy. If both caps are blown, it shouldn't cost than a few dollars each for new 8uf caps. Potentionmeters cost just a bit more but can still be found starting at a few dollars. I would hope that contact cleaner would help the problem before you go shopping for anything.

The fact that you have tweeter sound playing with your pots volume would mean that your capacitors are good. If it was blown, you would have no signal to the tweeter at all.

***You will have to take out the woofer, you have no choice if you hope to find and correct this problem. You have to get to the pots in both speakers to pour or spray contact cleaner in both pots. It can not be done correctly using only your tweeter holes.