I went to the best audio/video shop in town and they told me that since the crossfires roadsters have a metal plate between the trunk and the cockpit seats, that hardly any vibrations from a sub enclosure in the trunk will even pass through to the passengers and therefore render the entire idea useless. So he suggested unless i wanted to do some custom mod that had to do with molding and stuff in the cockpit area, i should just stick to upgrading speakers and forgetting about a box with subs.

Is this guy full of crap? Has anyone a roadster with a box in the trunk?