Noise from my audio only when engine is ON
I know it has been discussed many times and I read a lot of threads but still cannot get rid of this noise. Here is my setup:
An external sound card output is connected to PAC Turbo1. I need this amplifier because the volume is too low without it. From Turbo1 the output goes to my factory Bose system. When the engine is OFF everything is just fine, but when it is ON I can hear a noise in my speakers which changes as engine rev is goes high. When I disconnect the input from the Turbo1, so it is only connected to my factory stereo I can still hear the noise. In my opionion it means that the sound card and carPC have nothing to do with this noise. I power the Turbo1 from my car lighter socket. I also tried a ground loop isolator but it doesn't help at all. Any ideas ?
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