Re: Need Help, 15" Q
If you knew that program could be off, why did you use it? WinISD is free and takes 3 seconds to download.
I can't check for you at work but I think it looks good. The dimensions are very close to my Fi Q 15 box which is 3.5 cubic feet at 33hz.
Also the inner diameter on a 15'' Fi Q is 14 1/8'' so make sure you build your box in a way that you have the full 15.5'' of height on the front panel.
References : chaunb3400, Team H&K, diminishedpower, pickup1, sublime06, sporty_drew, JRock10, Jando86, sundownz