HF noise in PA speaker when play music from PC

Discussion in 'General Electronics Chat' started by Maddoktor, Jan 29, 2012.

  1. Maddoktor

    Thread Starter New Member

    Dec 20, 2011
    7
    0
    hi on everybody
    i have this problem .

    http://img822.imageshack.us/img822/4931/71944800.jpg

    When i connect my PA amplifier ( Biema W220II + Oberton S122 ) in my PC with Creative X-Fi extreme music and Fortron Bluestorm 500w - i have HF noise :
    This noise is equally, if I nezvisimo reduced end sound card or I strengthen it completely (this is when music stopped)

    This photo was taken in setting 2uS/dev - and I have approximately 100kHz

    How can I eliminate this noise?
     
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