I'll get the sizes shortly but its designed to sit under your seat..
It won't replace a large sub,I was going to use it as a bass fill in the front of the car but I had no need for it (I've got 2 12' Subs in the boot).Its pretty funky for normal listening levels and adding bass to your standard car speakers but If you crank the volume up LOUD it wont keep up and sounds boxy (if that makes sense).pretty good power but dont expect to shake the windscreen as I said I was going to use it a s a fill.