wcmack,
There appears to be a general issue with some sort of ground loop. My Pioneer Xm2Go receiver causes a terrible hum when piped in through the aux jack and with the power transformer plugged into either lighter socker. For my Ipod I have a Belkin ipod adapter which appears to have a small transformer (isolation?) and amp in it and that eliminates the hum issue with the ipod. It's also very nice because it allows me to match the ipod volume level to the radio/CD.
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Originally Posted by wcmack
Dear Chip,
I realize that you don't use your iPod on Aux now, but I am curious to know if you got the hum while keeping the iPod plugged in for charging. I noticed the a hum as well, but found that when the power adaptor was not hooked up to the iPod, the hum disappeared.
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