Yeah exactly you only need 1 you can't use an adapter with both. I've tried them on several different prIxs.

The grand prix with a single CD the adapters make the head unit think it has a CD changer. The monsoon has a CD6 so it can't have an external as well... the aux in will work with any car equipped with xm.

If there is something out that works with the cd6 indash setup it came out after I tried PAC and Axxels modules.

Aux input is digital.
-It will only sound as good as the music was recorded/copied too. Ex 128kbps, 256, etc.
- the quality of rcas and aux jack wires you use.
-A third factor is how much of an output your ipod or phone has. I have an SIII and it has a very powerful headphone jack so I experience no issues at all. Sounds great.

Fm blows. fyi lol

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