power is not everything. i can hit 120 db @ 10 hz my subs sweep 24leters of air and have a fs of 26hz they also have a ultra flat bl and ultra low thd and le. if you dont know what these are then all you are is buying a system. i slected mesured and tested and moddled my ht subs with 2 15 i could hit 140 db @ 55 hz i would do a ib setup. make a wall and seal it to the trunk on one side you have the trunk aka box and the other you have the car side.
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