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<blockquote data-quote="Damaso87" data-source="post: 656976" data-attributes="member: 557574">After reading the ported box tutorial, i got snagged on finding the port length...Lv = [(1.463*10^7R^2)/(Fb^2*Vb)] - 1.463Is the formula for finding the length, where Lv is the length, R is the minimum port area, Fb is the tuning frequency, and Vb is the interior volume of the box.The port area i got after plugging in for dV&amp;gt;/=39.37*(32*305)^.5 was 3889.46 cubic inches (or 2.25 cuft). Since i wanted a 16.5&quot; x 4&quot; slot port, do i take the area of that instead, since the 2.25cuft is a minimum?I want to tune the box at 32hz, the interior volume is 9813.3 cubic inches before driver displacement, and the driver displaces 305 cubic inches.Im pretty much stuck here, since i dont know what Bass Outlaw was doing in the formula. What i think the area of the port is, is the actual area that the port takes up (minus the 3/4&quot; MDF). Am i right? If so, how would i go on from there...?</blockquote>

[QUOTE="Damaso87, post: 656976, member: 557574"] After reading the ported box tutorial, i got snagged on finding the port length... Lv = [(1.463*10^7R^2)/(Fb^2*Vb)] - 1.463 Is the formula for finding the length, where Lv is the length, R is the minimum port area, Fb is the tuning frequency, and Vb is the interior volume of the box. The port area i got after plugging in for dV>/=39.37*(32*305)^.5 was 3889.46 cubic inches (or 2.25 cuft). Since i wanted a 16.5" x 4" slot port, do i take the area of that instead, since the 2.25cuft is a minimum? I want to tune the box at 32hz, the interior volume is 9813.3 cubic inches before driver displacement, and the driver displaces 305 cubic inches. Im pretty much stuck here, since i dont know what Bass Outlaw was doing in the formula. What i think the area of the port is, is the actual area that the port takes up (minus the 3/4" MDF). Am i right? If so, how would i go on from there...? [/QUOTE]

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