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Inexpensive Amp with proper GND plug?

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  • Inexpensive Amp with proper GND plug?

    I’ve tried some inexpensive amps for a workout room from Dayton and SMSI, and even a Yamaha, all with two pin plugs and no chassis grounding attachment, and they all put off incredible levels of EMF. Are there any relatively inexpensive amps that do things properly with a 3 pin grounding plug?

    One of the Dayton amps has three pins at the ac adapter, but inside the gnd plug isn’t actually connected to anything.

  • #2
    What are they causing interference with?
    Electronics engineer, woofer enthusiast, and musician.
    Wogg Music
    Published projects: PPA100 Bass Guitar Amp, ISO El-Cheapo Sub, Indy 8 2.1 powered sub, MicroSat, SuperNova Minimus

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    • #3
      Some medical monitoring equipment attached to a wheelchair. We’re very familiar with everything in the house needing to be properly grounded. But Amps seem to be a high power exception where it’s not standard.

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      • #4
        Have you tried grounding the case of the amp? A lot of them have a ground screw on the back of the case.

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        • #5
          Originally posted by TheManFromDenver View Post
          Some medical monitoring equipment attached to a wheelchair. We’re very familiar with everything in the house needing to be properly grounded. But Amps seem to be a high power exception where it’s not standard.
          Gotcha. I've never had interference trouble and most consumer electronics have always been 2 prong. 3 prongs usually cause more trouble with ground loops. An old school class AB amp with a linear power supply would be clean enough, 0 high frequency bits in those.
          Electronics engineer, woofer enthusiast, and musician.
          Wogg Music
          Published projects: PPA100 Bass Guitar Amp, ISO El-Cheapo Sub, Indy 8 2.1 powered sub, MicroSat, SuperNova Minimus

          Comment

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