I just swapped my XM box to feed into my factory radio with one of the interface boxes that allows an input where the CD changer would connect. Wow, what a difference.
The low frequency response is much better and the overall sound is incredible. If you have the option to connect your XM or any satellite radio using the RCA outputs, do it. The added expense is WELL worth it!!!

The low frequency response is much better and the overall sound is incredible. If you have the option to connect your XM or any satellite radio using the RCA outputs, do it. The added expense is WELL worth it!!!