I don't know about the Crossfire, but I had a custom subwoofer box made for a Sebring convertible a few years back that fired into the top well and had no issues with rattling the folded top, and it sounded real good too. Looking at the specs on that amplified sub, I don't think it will fit under the seat, in the trunk might be the only workable location. I used a pair of the earthquake SWS 6.5" shallow mounts in the factory rear locations behind the seat in my Crossfire and was pleased with the result, its bass you can feel, but not like a larger sub with massive amounts of power, more of a good full range sound. It all depends on what you are looking for out of your system. Also you could use the extra 2 channels on that Soundstream amp to power the earthquakes.

I am no more than a couple hours away from you if you want to meet up and hear mine before you take the plunge. Send me a PM if you are interested.


Good Luck!