j/k......not sure, but i ca tell you that a well designed and well built ported box will more than likely stomp hat shit out of some super bass prefab AND be half the cost..... hell you can probly pay someone who's good with box building AND it'll still be cheaper....im telling you man, **** prefabs.... hell if its just a sealed box ur going for u can build it yourself if the cuts are straight
a dude on here the other night had one of the boxes and it said super pro bass box or some shit on top of it and it was ported with 2.7 cubes for each of his 12" ma audios and tuned to 45. and from what everybody was saying it was the only good prefab box they had seen