Box design help

[Sketchup 10+ year member]

I am looking to make a ported no kerfs 3-4 cubic foot box tuned to 33hz. The avalable space is 35wX20dX15h

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[Buck 5,000+ posts]

//content.invisioncic.com/y282845/emoticons/wave.gif.002382ce7d7c19757ab945cc69819de1.gif you can email me if you want. It's in the sig.

 

[schrummy 10+ year member]

http://www.caraudio.com/forums/enclosure-design-construction-help/137804-free-box-plans.html

 

[Sketchup 10+ year member]

http://www.caraudio.com/forums/enclosure-design-construction-help/137804-free-box-plans.html

I just can figure out which one is the one i need??? The labeling on the pictures doesnt really help me