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iPod Hiss When Charging

Posted: Thu Oct 20, 2005 7:12 am
by Whalensdad
I have found that when my iPod is connected to my stereo AND is plugged into the cig lighter to charge, I get a hiss from my audio. If I disconnect the cig lighter charger, the music sounds great. I believe it is a ground loop problem but I'm not sure. Any suggestions on how to eliminate the noise AND still be able to charge while playing?Thanks,Whalensdad

Re: iPod Hiss When Charging (Whalensdad)

Posted: Thu Oct 20, 2005 10:32 am
by mcgusto82
my cell phone does the same thing.i've noticed that when using the outlet in the center console, this doesn't happen. or i'm just simply not noticing it.

Re: iPod Hiss When Charging (Whalensdad)

Posted: Thu Oct 20, 2005 11:48 am
by ColonelPanic
Same problem here with my phone charger. Unlike mcgusto though, if I plug it in the console, the noise is still there. It doesn't affect FM broadcast stations - just the itrip or the Sirius FM transmitter built into my Sportster. Probably poorly designed power supplies for the stuff we are charging... Needs a filter somewhere, I imagine.

Re: iPod Hiss When Charging (Whalensdad)

Posted: Thu Oct 20, 2005 12:02 pm
by GMJAP
This is most likely a ground loop problem. It happens cause the audio source is grounded to the car in two different places (one- audio connection, two- power connection).The grounds can be at slightly different voltages, so current travels between them through the ipod connections. This causes the noise.Try looking on audio dealer sites for a "ground loop isolator".