2 SQ HDS3 12's Enclosure

I understand you just need to know where the numbers are being skewed. After you enter in port dims does your app ask for port wall thickness ? Your first calculation for port was 11.5*22.5*5.25=.786 but if it used this number it was alrdy off by .11 because 11.5*22.5*6(.75 more displaced by outer port wall) = .898 L shaped ports utilize the outer wall and dont have to account for one wall of displacement, center ports displace more volume because of the extra wall on each side. Most calculators cant see your box config(floorplan) they will just assume its a straight port 22.5" long. Anytime you use a flared port it does not count as port length but this is minimal as a general rule add another inch to the port if its flared to account for the radius. I suspect the small differences are adding up.

 
I understand you just need to know where the numbers are being skewed. After you enter in port dims does your app ask for port wall thickness ? Your first calculation for port was 11.5*22.5*5.25=.786 but if it used this number it was alrdy off by .11 because 11.5*22.5*6(.75 more displaced by outer port wall) = .898 L shaped ports utilize the outer wall and dont have to account for one wall of displacement' date=' center ports displace more volume because of the extra wall on each side. Most calculators cant see your box config(floorplan) they will just assume its a straight port 22.5" long. Anytime you use a flared port it does not count as port length but this is minimal as a general rule add another inch to the port if its flared to account for the radius. I suspect the small differences are adding up.[/quote']
Yes it asked for port thickness. It also asks for common walls, external port length, displacements of sub's, displacement of bracing. It asks everything... My port is just a straight port, no L and no flare.
 
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bgowdy

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