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Originally Posted by btrvalik
I have tried all voltage settings.. 2V seems to be the best setting as well as eq settings on the ipod. I would like to determine if this is a ground loop problem that is coupling noise into the audio path. I'm out of town currently but I was thinking I could try unplugging the audio connector from the ice-link ( 6pin connector I believe) and connect a set of headphones to the ipod. If this eliminates the noise when listening over the headphones, it seems to me that an isolation transformer on the ice-link audio connections should fix the problem. I could then modify the icelink cable to include an isolation transformer.
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FYI... any transfomer I've ever tried to put in an X5 that wasn't shielded picked up EMI noise out of the air. Noisest car I've ever seen.
The only ones I've used successfully have been the Iso-Max CI-2RR. MSRP is $200, you can find them for less, but anything like the normal $20 Radio Shack units will make it worse. I've actually held a tweeter to my ear and moved the GLI around and heard the noise change with position.