I'm sorry if this has been posted before but, I'm looking for a lightweight sub for my hatchback because I want my car to be fast to semi-fast and have good bass at the same time. I don't know if that will be possible though. I wanted to get 1 15 XXX but I don't know how much 1 weighs without the box? What would you guys suggest that would sound good, still be loud and wouldn't weigh that much. By the way, I would like it in a ported box, maybe 4 cubes at the most and tuned to 29-35 Hz. Thanks for your help!