my friend got a 15 mojo, and i got to here it today. its in 5 cubes @ 38Hz. he says he got 2000w to it...but i don't know what amp...it just sounds like an awful lot of power for 1 15 ported in that big of a box @ 38Hz daily driver. either way, its almost as loud as mine (by ear), but mine sounds WAY more musical, and faster(trade off in him having a ginormous box) but what i was thinking is even tuned @ 38 it would still hit all the low notes in rap songs, would i still be able to hit all the low notes like that if i tune to 38-40Hz? or would i need a ginormous box as well? i'm only planning on 5 ft for both drivers. or is it just mojo's need huge boxes?