I don't know a huge amount about car audio so not too sure what details to post. It's a Kicker 10" sub in an enclosed box with a US Acoustics 2150 amp. Bought the sub itself last year and the amp I got a couple years ago off another member on here. The system is still sitting in the car so can be heard in action until the car itself is sold. I can provide all necessary wires to hook it up for you also.
This sub is great for that little bit of extra oomf. It's not crazy enough to shatter windows but it pads out the music nice and lets you keep most of your trunk still!
Heres a link to the amp for details:
US acoustics USX-2150 150W x 2 Car Amplifier at Crutchfield.com
Asking $200