A cardboard box wouldn't hold the car. You need a big wooden crate.
Edit: oh a sub box. Well think about these things... what kind of sub are you thinking of using? what size? what kind of music do you listen to? how much power are you feeding it?
Edit: oh a sub box. Well think about these things... what kind of sub are you thinking of using? what size? what kind of music do you listen to? how much power are you feeding it?
