u got a cheap box for my alpine 12'' i payed 40dollars for it. If i get a bandpass box with no hole for 69.99 with one would be better. HERE WHAT THE BANDPASS BOX LOOKS LIKE would be be really louder or the same
A bandpass with no port? //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif
And putting Type-R's (I'm assuming that's what you have) is a horrible idea.....build your own sealed or ported box. Should cost around 50 bucks or so.
Bandpass and ported boxes need to be built specifically for the subs being used. An "off the rack" pre-fabricated bandpass or ported box will only sound good if you get very very lucky.
Sealed boxes for low-to-moderate power can be bought pre-made and used with decent results. Check http://www.ikesound.com - click on "Raptor" in the left-side navigation frame. Those are some pretty good pre-fab boxes.
Ported and Bandpass boxes should never be just "bought" unless they are specific to the sub (like some JL Audio's boxes).