HF noise in PA speaker when play music from PC

Thread Starter


Joined 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?