size, appearance and DEEP BASS! left lotsa room for my golf clubs!!

none.

i was reluctant to buy it at first b/c the enclosure seemed sorta small for a single 12" sub. but alumapro did a great job engineering the box to the exact specs of its speaker. minimum size, maximum sound! the bass is extremely loud, deep and responsive. a single 12" sub is enuff to make your ears ring.

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pair of 10" JBL subs in a bandpass box. the single 12" was way louder and deeper with the same amount of power and took up half the space in my ride.