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<blockquote data-quote="TheVanMan" data-source="post: 302047" data-attributes="member: 546085">//content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif Wow, thanks for catching that. I did have my calculations correct I just was supposed to put 8.25&quot; instead of 9&quot; (it only messed up my port displacment by like 0.002). However I did luck out since the port is now 8&quot; away from the wall. I fixed everything now. Your too good at this stuff, it scary. The formulas I found was from a post you had a few months ago.Here it is:H = Height (external, in inches) = 18&quot;W = Width (external, in inches) = 34.5&quot;D = Depth (external, in inches) = 17.75&quot;T = Thickness of material used (Most common = 0.75&quot; MDF)Hv = Height of the port (in inches) = 16.5&quot;Wv = Width of the port (in inches) = 2.75&quot;Ap = Area of Port (in square inches) = 45.375in^2De = Effective diameter (in centimeters) = 19.306cmLv = Length of the port (in inches) = 26&quot;Vg = Gross volume (in cubic feet) = 5.120ft^3Vb = Net volume (in liters) = 4.071ft^3 = 115.300 litersVd = Port displacement (in cubic feet) = 0.8385ft^2Dd = Driver displacement (in cubic feet) = 0.21ft^2Bd = Brace displacement (in cubic feet) = (have decided yet)Fb = Tuning frequency (in Hz) = 31.27hz</blockquote>

[QUOTE="TheVanMan, post: 302047, member: 546085"] [IMG]//content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif[/IMG] Wow, thanks for catching that. I did have my calculations correct I just was supposed to put 8.25" instead of 9" (it only messed up my port displacment by like 0.002). However I did luck out since the port is now 8" away from the wall. I fixed everything now. Your too good at this stuff, it scary. The formulas I found was from a post you had a few months ago. Here it is: H = Height (external, in inches) = 18" W = Width (external, in inches) = 34.5" D = Depth (external, in inches) = 17.75" T = Thickness of material used (Most common = 0.75" MDF) Hv = Height of the port (in inches) = 16.5" Wv = Width of the port (in inches) = 2.75" Ap = Area of Port (in square inches) = 45.375in^2 De = Effective diameter (in centimeters) = 19.306cm Lv = Length of the port (in inches) = 26" Vg = Gross volume (in cubic feet) = 5.120ft^3 Vb = Net volume (in liters) = 4.071ft^3 = 115.300 liters Vd = Port displacement (in cubic feet) = 0.8385ft^2 Dd = Driver displacement (in cubic feet) = 0.21ft^2 Bd = Brace displacement (in cubic feet) = (have decided yet) Fb = Tuning frequency (in Hz) = 31.27hz [/QUOTE]

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