hello guys, i need the help of some experts i guess
i changed my installation from my old car to my new one, the e36.
when my engine isn't running it is like everything is ok when i play music, but when i start my engine there is an anoying "whistling" sound in my rear speakers, that goes along with the /rpm , the more /rpm's the higher the whistling.
What can i do about this ??
greets and thx in advance