subwoofer tools??

[jester king 10+ year member]

I was just wondering how accurate this tool is, this is my plans for my box, could anyone tell me if these plans are correct thanks

http://subwoofertools.com/forum/ported-box.asp?Ew=17.5&Eh=10&Dia=2&Xmax=18.3&Vd=.08&NumW=1&Vb=.66&Fb=33&Qts=&Vas=&Fs=&CE=0

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[mlstrass 5,000+ posts]

I've built several boxes using it and they've all turned out fine.

How much port area do you need for your sub? Since it's only a little over 1/2 a cube, you could lower the xmax figure to change the port area. Something like this maybe:

http://subwoofertools.com/forum/ported-box.asp?Ew=17.5&Eh=10&Dia=2&Xmax=12&Vd=.08&NumW=1&Vb=.66&Fb=33&Qts=&Vas=&Fs=&CE=0