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Message: <blockquote data-quote="bigbud747" data-source="post: 4486254" data-attributes="member: 581322"><p>I am going to build another box for 2 18's (Fi Bl's). It will be 10.81 cubes after sub displacement. I figured that I will need about 158 sq. inches of port area. The port itself will be 3.55" tall and 44.5" wide. My only question is, since I want the box tuned to 34hz, how long do I need to make the port? Or, is there a site that will tell me how long to make the port if I put in my figures?</p></blockquote><p></p>

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