which sub?

I wouldn't go buy anything yet...you still have no idea what you want...I wouldn't look at anything anyone suggests yet as it is irrelevant to the situation. What kind of music do you listen to?? what kind of bass do you want??? how much room do you have?? just suggesting two 15's and amps is NOT helpful at all...does he have the room?? In the trunk of a grand pri...I doubt there is enough room for a proper enclosure. Can the electrical system handle 4000 watts?? doubt it.Custom Enclosure Design

ok

I listen to rap hip hop rock and country.. mostly rap and hip hop..  i want a loud ass system that will rattle things away from my car.. and if i get he fifteen, i dont think i will need two of them. please give me more suggestions.. im open to anything.. thanks guys!~K.Gren~

I'd get a single AudioQue HDC12 and the AQ 1200 watt amp. Match perfectly. Build a ported enclosure for that around 2.5 cu ft tuned to 40Hz it will be wanging hard. Or if you have enough room you can try out my chambered transmission line for it.Custom Enclosure Design