newest episode of pimp my ride, they put a 22 inch mtx jackhammer subwoofer into the car. only one made so far. it weighs like 345 pds, had to put it in with a cherry picker! it cranks so loud they had to put a warning meter in to keep it safe. they had it at very low and it got 30db which they said was louder then an airplane engine. they said it can do four or five times the noise of a plane engine... big question, what use could there be for all that bass?