I really like all the posts about the different head units that can be used for the crossfire.

I recently talked to a local audio shop owner and he mentioned that if i wanted to install any kind of head unit on my 2006 crossfire, I would have to buy a "chrysler modulator" for the car or else i will have problems in the future.

Is this something that you guys bought? or is it just some kind of way to get more $$$ from my wallet?

thanks guys