Ashdown ABM sounds fuzzy??

Discussion in 'Amps and Cabs [BG]' started by Dasgre0g, Oct 16, 2017.

  1. Dasgre0g

    Dasgre0g DasGre0g Supporting Member

    I've always has great luck with Ashdown amps but recently picked up a "new/old stock" Ashdown Abm 900 Evo III. While the right (top) speaker outputs sound amazing, the left (bottom) Poweramp sounds like there is literally a fuzz pedal running parallel with the actual signal from both outputs. Anyone else have a similar issue or insight? The dealer basically told me they can't, and to contact Ashdown who I am in some correspondence with. Not that I NEED both poweramps, but it's nice to know it is functioning as it should! 20170817_140148_atc_1506086543410.jpg
  2. Demo stock, no warranty?
    Dasgre0g likes this.
  3. BassmanPaul

    BassmanPaul Inactive

    Link Send and Return with a signal cable see if that helps.

    Insert a plug into the line input jack a few times to exercise the jacks contacts.

    Are there more sockets on the back panel?
  4. Dasgre0g

    Dasgre0g DasGre0g Supporting Member

    Here's a good look back of the amplifier overall, and then specifically the speaker output section with the two outputs that do not work circled, which are a separate power amp then the ones above them. Going to take your advice here in a few minutes and see if anything happens! 1600-ABM900EVO3_detail04_atc_1506086543229.jpg 20171016_173053.jpg
  5. Dasgre0g

    Dasgre0g DasGre0g Supporting Member

    Ashdown suggests a a likely short in one of the left amp's capacitors or transistor. *Shrug*
  6. Should be easy enough for a tech to track down then. Get the schematic from Ashdown and print it for your tech.

    There's a list thread of recommended techs all over the world here:

    Good amp techs!
  7. Dasgre0g

    Dasgre0g DasGre0g Supporting Member

    But I'm hoping! And thank you for the thread link. I can have a schematic and hopefully it won't take long or cost too much. I appreciate all the help everyone
  8. Dasgre0g

    Dasgre0g DasGre0g Supporting Member

    Thanks again everyone! The schematic and the points that Ashdown made for me work perfectly and it was fixed rapidly