is this right?

[jumpfreak26]

So on the maufacturers page for an iDQ 15 D2 V2, it says for a small ported box(which I have, gross volume is about 1.9.. //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif small i know.) It says for 2.0 cuft ported box, I should use a 4" port thats 13.5" long. Does that sound right to any of you guys??

I tried using one of the calculators I found someone suggested on here, heres the link. (http://www.carstereo.com/help/Articles.cfm?id=31)and it comes out with a port diameter of 7.3 inches??!! and a port length of Na.....ha. any ideas?

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