Sounds pretty nice for a box of this size. Given the limited space of my Ram 1500 and it's limited acoustics I would say that it does a pretty nice job with a 12" sub. Lows sound great at low volumes, but don't expect to rattle the whole cabin. It complements the whole system. It looks great under the rear seat and fits well with the provided parts to fix the height of the seats. Overall I'm satisfied and will keep it.