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They just quit!!

Discussion in 'Amps and Cabs [BG]' started by mikemulcahy, Oct 25, 2001.


  1. mikemulcahy

    mikemulcahy

    Jun 13, 2000
    The Abyss
    I have 2 Peavey 118 with 1000w JBL's that I run with a Crown Powerbase3 on each. We had a gig last weekend and they performed flawlessly as usual, last night I hooked them up for practice...NADA, nothing. All cords and amp cross checked fine. I have no clue as to what happened or what the problem is.


    Mike:confused: :confused: :confused:
     
  2. MikeyD

    MikeyD

    Sep 9, 2000
    Your location says "The Abyss". Maybe they got waterlogged. ;) You should take a look at the drivers and see if the wires broke off somewhere, including the voice coil leads.
    - Mike
     
  3. mikemulcahy

    mikemulcahy

    Jun 13, 2000
    The Abyss
    I will, isnt it unusual for the same thing to happen to both, at the same time?

    Mike
     
  4. First step is meter the coils on the JBLs. If open, you have burned them out for whatever reason. If you don't have a meter, hook up a flashlight battery and see if the cones move. This will establish dead or alive drivers.

    Then start moving upstream, and borrow whatever parts you need to swap until you find the dead one.
     
  5. Seems paculiar that you put them away working and now they do nothing. Does some else have access to the cabs? Maybe they were blown by someone while you weren't there.
     
  6. DaveTomasi

    DaveTomasi Gold Supporting Member

    Dec 15, 1999
    Baltimore, Maryland
    Mike,

    If the signal chain is from the source through you speaker cables is OK, is it possible that your Peavey enclosures and/or the JBL drivers are protected by a fuse or breaker system of some sort and that might be the problem? Although it does seem unusual that both cabinets would crap out simultaneously. I hope that it's not something costly.
     
  7. mikemulcahy

    mikemulcahy

    Jun 13, 2000
    The Abyss
    Thanks guys I will check them out tonite.


    Mike
     
  8. Did you find the problem with those cabs?
     
  9. mikemulcahy

    mikemulcahy

    Jun 13, 2000
    The Abyss
    Couldn't get to it last night, hopefully tonite. Thanks for checking.


    Mike
     
  10. DaveTomasi

    DaveTomasi Gold Supporting Member

    Dec 15, 1999
    Baltimore, Maryland
    Mike,

    Were you able to get a resolution to this yet? Hope it was just a loose connection or something minor.
     
  11. mikemulcahy

    mikemulcahy

    Jun 13, 2000
    The Abyss
    Not that luck Dave, when I removed the speakers, they were frozen up solid. Voice coils were melted.

    Oh well, it's only money right!!


    Mike
     
  12. MikeyD

    MikeyD

    Sep 9, 2000
    Nearby lightning strikes can sometimes cause this kind of thing. Whatever the cause, it is unfortunate.
    - Mike
     
  13. DaveTomasi

    DaveTomasi Gold Supporting Member

    Dec 15, 1999
    Baltimore, Maryland
    Mike,

    That really hurts!

    Between the last time that they worked (your last gig, I think) and your initial discovery of the malfunction, could anyone else have gotten to your rig without your knowledge? At the gig, was the power chain to your rig protected by any surge suppression or power conditioning gear? My experience has been that whenever you play out, you just never know what kind of strange electrical gotcha's may come your way (inferior / faulty wiring etc.). Just some thoughts. The sad thing is that it's money that you should not have to spend in this manner but could have spent elsewhere.
     
  14. mikemulcahy

    mikemulcahy

    Jun 13, 2000
    The Abyss
    That is so true Dave, especially when I dont accept any money from the gigs, it all goes to the other members who could use it more than I.

    To your question, nope, it was in my control the entire time, with a surge protector and conditioner.


    Beats the hell out of me!!!

    Mike
     
  15. mikemulcahy

    mikemulcahy

    Jun 13, 2000
    The Abyss
    2 new JBL's and all is well again.


    Mike
     
  16. Yikes!

    Were they re-coneable?
     
  17. mikemulcahy

    mikemulcahy

    Jun 13, 2000
    The Abyss
    Nope, had to get new ones.


    Mike
     
  18. MikeyD

    MikeyD

    Sep 9, 2000
    If you didn't notice any problem with them as of when you last used them - and they were always under your control, then a lightning strike might be more plausible. Was there any thunderstorm in your area during that time? Where were they stored? A surge protector on the amps might not be effective in such cases.
    - Mike
     
  19. My regrets on your loss. I've never seen coils fry so bad that they destroy the magenetic assembly. New JBLs are a serious expense.

    Is it possible you are using an under powered amp?
     
  20. mikemulcahy

    mikemulcahy

    Jun 13, 2000
    The Abyss
    I doubt it, I use a Crown Powerbase3 for each 18 (thats about 1400w into 4 ohms) and a powerbase2 for each of the 410's.


    Mike