first off the subwoofer should've brought a sheet with the specs for difrent boxes, if not I'm sure there website has more info on this. Just curious why bandpass, there extremely efficient design but they have that one note bass sound, and very narrow frequency response. Also bandpass boxes are not very forgiving if you make error either on box size or port size. You could go with ported, a little less efficient but better sound then a bandpass. Just a few thigns I thought you should know, If you don't find any specs for a box email me I'll be glad to help you out, I'll get my hands on the box design if your having trouble.
