[Jersyboyy]

Grab a bass tube itll add the bass your looking for and allow you to keep your space in the back and not cost alot. Their easy to hook up to. If you really care for a good system get a custom box for the wheel well or go all out like I did and get a custom box for the whole rear well. 10's in a properley tuned box will POUND and still sound very crisp. 12"s will sound alot louder and slam harder but takes away from the quality.
I have a custom box for 2 15"s with a plate on top that allows me to use my 10's. I use the 15"s when I want to hurt peoples ears, o and im only using a 200 watt 2 channel bridged amp!