http://www.adireaudio.com/Mobile/BrahmaSeries.htm
There you will find all the answers somewhat...and with those you can go to
http://www.subwoofertools.com/forum/ported-box.asp
and design your own box to your own needs, very simple ...It give you all the criteria you need :d..I have the same sub but bigger(15") and I use a 3cft sealed, sounds alright, ported is the way to go

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I've seen many things in my time, but to achieve any of them is a different story!