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Message: <blockquote data-quote="Peach" data-source="post: 8462854" data-attributes="member: 668342"><p>I have posted on here trying to find someone to design me a 4th order box without any response,so guess I'm going to try it myself.  I know h x w x d divided by 1728 gives me my cubic ft and I know the displacement of my subwoofers. I'm going 1 ft sealed per sub and 2 ft ported per sub tuned at 45hz for my daily. I'm going to make a removable bolt on port. How do I calculate the displacements of the 45 degree corners for bracing? I plan on doing a external port but can not find a online calculator for external ports. I'm assuming I could use a regular port calculator and the subtract the displacement of the port from the box, because the port calculator would automatically add the displacement to the box?</p></blockquote><p></p>

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