Port size question

[ravendarat 10+ year member]

Im starting my build tomorrow for my spl van and am having some issues figuring out my ports. The ports will be slots, they need to be no bigger than 3 by 24 inches. The sweet spot in the vehicle looks like its in the area of 55-60 hz. When I was trying to plug these numbers into my equation it was giving me results that basiclly ment it was impossible to do. The box volume is 4 cubic feet. Any help here would be appreciated guys. all Im looking for is the port length needed

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[ravendarat 10+ year member]

Come on, someone has to have some input here. I have to get on these boxes fairly quickly so I can get this thing on the road. I need to make 8 of these boxes total to house my 16 12's

 

[StreetWaves-OH]

Depends on how your enclosure is designed. Is the Port Vertical or horizontal, & same for the subs. E-mail me a rough sketch of your design and your overall max height and width for the entire enclosure and i'll get you some info. stwavesaudio@yahoo.com http://www.streetwavesmobileaudio.com

 

[jeremiah 10+ year member]

? what some thing like this? http://www.subwoofertools.com/forum/ported-box.asp?Ew=25&Eh=25&Dia=6&Xmax=11&Vd=0.23&NumW=2&Vb=4&Fb=55&Qts=&Vas=&Fs=&CE=0