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Speaker disturbance

Discussion in 'Soundcards' started by Kev Ivris, Oct 12, 2003.

  1. Kev Ivris

    Kev Ivris Guest

    Hey all.

    I've got a standard run-of-the-mill 2.1 PC speaker set. They work fine with
    my laptop except for the following issue. When I have my laptop power supply
    plugged in in the same room it creates a buzzing noise on the speakers. It's
    especially noticeable if the speakers and laptop are plugged in at the same
    outlet (through a surge protector). When I unplug the laptop and play on
    battery the music is crystal clear.

    How do I get around the disturbance?
    Running an extension cable from another room is not an option...=)

    - Kev
    Kev Ivris, Oct 12, 2003
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  2. Kev Ivris

    Netmask Guest

    It sounds like either the power supply unit is not adequately filtered (a
    design fault) a fairly common phenomena with power packs, they generally are
    manufactured to minimum legal standards or you may have a 'ground loop'.
    Look up google for ground loops and explanations and fixes. Try shielding
    the power pack in a metal box and move it well away from everything else -
    just might help. Also make sure your input leads to the amplifier are as
    short as possible and are not looped around. Also some surge protectors can
    introduce noise especially if the 'thyristor' or equivalent is not 100%
    Netmask, Nov 3, 2003
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