Why not, eh? Nice stock speakers, great music collection. Subwoofer for the car!
I bought an Infinity Reference 1030W subwoofer ($51) and a Boss Chaos C250 2-channel amp ($68). Originally, I was going to buy an enclosure, but finding one that would fit right in my trunk proved impossible. I was feeling adventurous, so I made my own damn box. Using 5/8" particle board ($5) and a handful of screws I made a box, spec'd to the rated volume for the subwoofer. I can't just have a bare wood box in my trunk, so I browsed Lowes until I gathered the materials suitable for a box... that... goes in my trunk. Ten feet of 14" aluminum flashing ($15), 16' of 1" corner molding ($7) and miscellaneous woodworking materials. Oh, and the 5 gallon bucket, I'll get to that later.
I cut and attached the flashing with 1/2" wide head screws.
I VERY CAREFULLY cut and attached the corner molding with some small nails.
This is the final filled, sanded and painted enclosure. With the rim of the bucket I bought also painted, cut and nailed around the opening to polish off the box. Nice eh?
And then the install... eh, well. I'll install it soon. Hooked up in a bridged/single coil configuration.