2x12 began to smell like an electrical fire...

Discussion in 'Amps [BG]' started by MarkBC, Jan 25, 2013.


  1. MarkBC

    MarkBC

    Joined:
    Jan 23, 2012
    Location:
    Denver, Colorado
    Hartke LH500 -> Epifani 2x12

    Towards the end of a gig Friday night during our 3rd set I began to smell what smelled like an electrical fire. I bent down and realized it was coming from my cab. At no point did the sound begin to crack or distort in anyway. For a few seconds the sound seemed to go away but I couldn't be sure. There wasn't any smoke or anything.

    After shutting off the amp for a few minutes I played our encore on a much lower volume.

    Anyone have any idea what the problem might be? It still works but the smell is bad, seems like something is about to go. What would it be that didn't effect the sound?
  2. bumperbass

    bumperbass

    Joined:
    Jun 19, 2012
    Sounds like you may have fried your tweeter or crossover.
  3. Steve Dallman

    Steve Dallman Supporting Member

    Joined:
    Mar 5, 2006
    Location:
    East Central Wisconsin
    Or the L pad, if there is one. I've seen and smelled this one before.
  4. fdeck

    fdeck Supporting Member

    Joined:
    Mar 20, 2004
    Location:
    Madison WI
    Disclosures:
    HPF Technology: Protecting the Pocket since 2007
    The good news is that when something's burning up, you can usually spot the damage on close inspection. For this reason it might be worth popping one of the drivers and taking a good look inside with a bright light for anything that looks like it's discolored from heat. If the x-over is in a PC board you might have to look on both sides of the board, in case the problem is due to a bad solder joint. Also look closely around the jack plate area to make sure nothing is happening such as wires or contacts getting crossed.

    If you find nothing wrong, that's bad news, as it means that a trip to the tech is in order.
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  6. musicman666

    musicman666 Supporting Member

    Joined:
    Sep 11, 2011
    Location:
    ca
    Maybe the tone gnomes got cold and warmed themselves with a small fire?
  7. BassmanPaul

    BassmanPaul Gold Supporting Member

    Joined:
    Aug 25, 2007
    Location:
    Toronto Ontario Canada
    I feel that maybe you are asking too much from your single 2x12. Possibly a second identical cabinet will prevent this occurring again.
  8. SactoBass

    SactoBass There are some who call me.......Sactobass

    Joined:
    Jul 8, 2009
    Location:
    Sacramento California
    +1
  9. B-string

    B-string Supporting Member

    Joined:
    Nov 21, 2008
    Location:
    Lake Havasu City, Az USA
    As fdeck suggests remove the input plate on the cab and visually inspect. If you are using 1/4" cables I have seen the 1/4" jacks overheat and melt/burn the plastic plates. Any weak link will overheat and should be noticeable. Check the speakers for free movement as well.

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