Ty, I had a 12" kicker L7 with a small box that I found on Ebay from SonicElectronics. It absolutely slammed in my 99 Grand Cherokee. I plan on getting one for my boat in a few months.
great loud btu still good sounding sub for a small box is the adire audio brahma 12. I run mine in a 1.2 cube box (needs 1 after displacement) and it is the best sub I have owned. With 800 watts I have hit a 144.6 spl in my car and know I can get more with better power and box.