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Calling all Ashdown ABM owners: your help needed please!

Discussion in 'Amps and Cabs [BG]' started by Kapucheen, Mar 14, 2013.

  1. Kapucheen


    Mar 13, 2013
    Hi everyone, first time poster.

    Question: when you turn your Ashdown ABM (or other) amp on, apart from any noise from the fan(s) in the back, do you hear ANY noise from the speaker without a lead/instrument plugged in?

    And if you do, does that noise get louder when you increase the "output" volume knob?

    Thanks for reading/responding.


  2. praisebass


    Aug 20, 2009
    Not on my Ashdown EVO II ABM combo.
  3. Kapucheen


    Mar 13, 2013
    Thanks praisebass - so you don't get a hum, just silence? Silence as if you've pressed the "mute" button on the amp?
  4. mystic38


    Dec 4, 2012
    Mystic CT
    it is not unusual for some hiss to be heard at high gain.. particularly on older designs. some slight hum may be present, but this could also be the house wiring inducing the hum into the amp, rather than being generated by the amp itself.
  5. andrew


    May 20, 2000
    Vancouver BC/Pacific Northwest
    Endorsing Artist: Aguilar Amplification, Spector, Regenerate Guitar Works, Tech 21 NYC
    No noise from my o.g. ABM 500.
  6. Kapucheen


    Mar 13, 2013
    Thanks for the replies.

    I've wanted an Ashdown for a long time. I bought the amp (ABM EVO 300w C115) second hand, mint condition, flight-cased from new etc. I tested it at the chaps house, sounded ace.

    Got it home and I didn't have chance to try it until the weekend. I plugged it in and it has an audible hum. Bit like when you approach with a single coil pick-up bass. But the hum is without anything plugged into the amp. Tried it in 4 other rooms, with and without extension leads. Tried different power leads as well. It hums from the off with "output" at zero and the only thing that affects it is when you turn the "output" knob up - it gets louder, but not really any louder once you get past 12 o clock.

    Now I swear there was no hum from it when I tested it. So this bugged the crap out of me and I took it to an amp repair guy, albeit one that specialises in old valve amps. He said that the sound was normal for a pre-stage valve amp of that wattage (!)

    My old Laney DP150 solid state is 20+ years old but is silent. So I popped into a local music shop who sell Ashdown's and they said there should be no noise!!! FFS

    So....our drummer is in the trade and put me onto an Ashdown dealership he goes to which is 2 hours drive away. So yesterday I took it along. They fetched an identical EVO II 300w head and plugged my speaker in. Same hum. Then they plugged my amp head into an Ampeg cab. Same hum. Then they got a 900w ABM head and plugged that into my speaker, same hum. So the conclusion was that all ABMs must produce an electrical hum (even with "output" at zero)!

    So when you guys say "no noise", do you mean silent like the "mute" is on? or is there a.........hmmmmmmmmm!

    Thanks for your replies.

    So do your amps make a "hum"? or am I going mad(der)!
  7. Marial

    Marial weapons-grade plum

    Apr 8, 2011
    I get no hum out of my ABM 500 EVO II, but I do get a nice 'thump' when I turn it off, even if the volume and gain are zeroed. You might PM Jacquo III-X, he's kind of the resident Ashdown expert. He's helped me in the past, good guy.
  8. gazzatriumph


    Sep 27, 2012
    ABM 500 evo 3 head and abm 610 cab no hum
  9. praisebass


    Aug 20, 2009
    What was the outcome? I hope it was positive.
  10. Roko369


    Aug 5, 2012
    I use ABM 500 evo III and ampeg 8x10. No hum no thump, only the sound from fans. Great sound by the way.
  11. Bassist13


    Nov 19, 2008
    Barrie, Ontario
    Wondering if anyone else has possibly experienced this? I just picked up an Ashdown 550 Spyder. I have the dreaded hum with this. Tested through two different cabs.
  12. If the silly preamp tube inside is about to die or loose, it can introduce noise.

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