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Thread: Crossover troubles/opinions & help needed

  1. #1

    Question Crossover troubles/opinions & help needed

    I'll make a potential LONG story short.
    I got a diaphram kit from RobertG(Thanks Again), thinking I had a blown 066 tweeter in one of my pair of L166s.
    I take the tweeter and kit to a speaker repair shop in Ft.Worth and they test the tweeter and it works!!
    I go home and swap tweeters and sure enough the tweeter works in the other speaker.
    I'm a little perturbed and out of exasperation, I mock myself by adjusting the control for the tweeter, What good would it do, and
    Damn if the tweeter doesn't come back to life!!!
    Now I amazed.
    After testing the controls, it seems I have a dead spot from just past +1 to just past +3, but it comes back to life at the very end, which if marked, would be +4.
    There is sound all through the negative number range.
    I prefer the setting for both the mid-range and tweeter at a point between +2 to +3, that seems to be ideal for my taste.

    So my questions are

    1) Do the crossover controls need a simple cleaning or is this a symptom of a bigger problem?

    2) In the first step to rectify the problem is to clean the controls, What is the best cleaner/solvent to use for this???

    Any help or experience in this matter would be greatly appreciated!!


  2. #2
    Senior Member GordonW's Avatar
    Join Date
    May 2003
    Marietta/Moultrie GA USA
    If you wanna just try cleaning it, I'd recommend Caig De-Oxit D-5 spray. It's also available from Parts Express, # 341-200. I've rejuvenated LOTS of L-pads on lots of speakers, including JBLs, with these. Sometimes you run into a pad that's so corroded that it can't be fixed... but I'd say, probably 97.5% of the ones I run into, are just about good as new after a good spraying and about 50-100 control cyclings (to scrape away the loosened corrosion), followed by a small rinse spray...

    If you want to try to forstall the need to tear things apart, this might be a good first step to try...


  3. #3

    Thanks, I'll give it a shot!!!

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