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Alembic F-1X transformer hum?

Discussion in 'Amps and Cabs [BG]' started by remo, Feb 8, 2006.

  1. remo


    Jan 15, 2005
    does anyone elses F-1X have an audible hummmm from the transformer when you switch it on? I'm not talking very loud, just noticeable in a quiet room. I just discovered it's actually called "lamination rattle" and is usually caused by poor mains power.
  2. billfitzmaurice

    billfitzmaurice Commercial User

    Sep 15, 2004
    New Hampshire
    Owner, Bill Fitzmaurice Loudspeaker Design
    It's a natural condition and has nothing to do with the power. Potting the transformer can minimize the noise but if it's not audible under normal playing conditions it doesn't really matter all that much.
  3. remo


    Jan 15, 2005
    it would only matter to me using the F-1X as a DI in a sutudio control room. Could you please explain what "potting the transformer" is?
  4. eots


    Dec 18, 2004
    Cornell , IL.
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