Bazooka BTA6100 1-Way 6" Car Subwoofer
As all in one solutions go, you simply can't beat the A100 Amplified Bass Tubes by Bazooka. Designed to be a simple-to-install, yet effective upgrade to your car's existing mobile audio system, the A1...
Pros: Small, inobtrusive, moderate price. Significantly improves the sound of the stock radio.
Cons: Supplied mounting system is wobbly, may not be loud enough for larger vehicles.