I'm looking to put in a single 12" sub or possibly dual 10" in a box for under the rear driver side seat. I chacked on ebay but I wanted to see if there is anything else out there. Also, whats a reccomendation on a sub/amp combo that isn't anywhere near competition sound, but something to give me more bass, looking at not spending TOO much. Any help is greatly appreciated.

 

Unless you build a custom box, the only way that you can fit a store made box with a 12" sub is to raise the height of your back seat. A lot of companies make 10" sub boxes that fit nicely under the rear seat. MTX thunderform (sells on ebay), probox, supercrewsound.com, and probably more that I cannot think of. Most of them are around $100-$200 for the box. A sub will be around $100 and an amp will run you $200-$400, depending on how big you get. I am having someone custom make a 12" sub box for my 2001 supercrew. Good luck!