Umm. if u go to JL Audio's web site and call thier tech support number they will be more than glad to give you those numbers. You can even give them your deminsions of your area & they will make u a bluprint of the box, ported or sealed, and then e-mail them to you a couple hrs later at the latest. I've had them draw some up for me many times. Let them know u r using the OLD drivers, not the d-4's, the current sq subs. Remember, a ported enclosure is no where as forgiving as a sealed enclosure is, meaning if u don't get the size exactly right it's gonna sound like S#!t!!!
Now if it were me, and I'm just this big stickler on doing things only once, and being that the manufactuer will actually draw up the blue print for me, well I would go with what JL gave me every time! I mean who is going to know better than JL themselves? Don't know why anybody would want to put a W6 in a ported enclosure in the first place, cause it defeats the purpose in my own special opinion, but if that's what I were going to do then I would go with JL's advice, I even went ahead and looked up the number u need to call. OK JL Audio's Tech support # is 954-443-1100. See not only is thier products some of the best on the market today but thier tech support is just as good!//content.invisioncic.com/y282845/emoticons/fro.gif.c695f1f814b01c4ad99fe7f8cccadd29.gif