Amp problems

Discussion in 'Amps and Cabs [BG]' started by LLTravis, Jan 5, 2009.

  1. LLTravis

    LLTravis Guest

    Nov 24, 2008
    I've been using a SWR WM 4004 head for a few years now. It's the latest version of the amp pre-fender. I like the head a lot but recently it has started to give me problems.

    Sometimes it sounds perfect, then out of no where the sound will distort, then eventually it will go back to normal. It's very random when it does this, nothing triggers it and it's for no set ammount of time. Sometimes it will last seconds, sometimes minutes, sometimes for a very long time. Also volume doesn't affect it. It will do it at any volume.

    It's not my cable, bass, fuse, input on the amp, speakers, or speaker cables. I have tested all of that. I've opened the Amp up and didn't see any loose wires and no burn marks on any boards. It all looked really clean. So, I'm really at a loss as to what it could be. I'd like to get it fixed but before I attempt to track down someone who can repair it, I figured I'd see if any of you guys might have any ideas. Also, if it's gonna cost me more than 200 dollars then I'd rather just put that money toward a new head.

    Anyways, thanks for looking and any help will be appreciated.
  2. CosmicRay

    CosmicRay Supporting Member

    That's not good...where are you located?
    I know of at least two shops in the NYC area that I use....
  3. Sounds like it could be a dirty contact in either an internal connector, or you need to clean your jacks on the FX loop.
  4. thumpbass1


    Jul 4, 2004
    I second this motion. Seriously, try running a short instrument patch cable from the send of your FX loop right back into the return jack and play through your rig for awhile to see if the problem stops. If it doesn't occur, it means you have dirty FX jacks that need cleaning.
  5. LLTravis

    LLTravis Guest

    Nov 24, 2008
    It still does the same thing with a cable in the send/return. :(
  6. thumpbass1


    Jul 4, 2004
    Then take your amp to a tech. You have something else going on. Sorry about that, but do keep in mind that it's usually cheaper to repair most amps than to buy a new one in most cases. I wish you the best of luck.