That's what I thought. I have a Sony aftermarket head unit with an aux. input but is being used for the Sony changer in the trunk. I was wondering if it would be possible to install splitter cable and have both the Ipod and changer share the same aux input. I really don't want to try this unless someone knows for sure I won't fry my Ipod or changer from the audio signal back feeder into each other. Any electronic experts have advise.