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
    hi on everybody
    i have this problem .


    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?