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<blockquote data-quote="phoneman" data-source="post: 327895" data-attributes="member: 541477"><p>Port correction factor is used when you build a slot style port and it shares a wall with the box.&nbsp; Like if you built a box with a 3x16 rectangular port and it was built so that one of the two 16&quot; walls was also a wall in the box (port built against a wall in the box) making it so that walls length extended past the length of the port the you would have to take half of the width of the port (half of 3&quot; would = 1.5&quot; in this case) and add it to the port length to get your actual overal port length with correction factor.&nbsp;&nbsp; So if you were going to build a port like this and the design called for an overall port length to get a desired frequency you would make it 1.5 inches shorter to allow for port correction.&nbsp;&nbsp; Also when you measure a port with bends or L&#039;s in it make sure you measure down the center of the port and not the walls because you can be thrown off quite a bit if you dont.</p></blockquote><p></p>

[QUOTE="phoneman, post: 327895, member: 541477"] Port correction factor is used when you build a slot style port and it shares a wall with the box. Like if you built a box with a 3x16 rectangular port and it was built so that one of the two 16" walls was also a wall in the box (port built against a wall in the box) making it so that walls length extended past the length of the port the you would have to take half of the width of the port (half of 3" would = 1.5" in this case) and add it to the port length to get your actual overal port length with correction factor. So if you were going to build a port like this and the design called for an overall port length to get a desired frequency you would make it 1.5 inches shorter to allow for port correction. Also when you measure a port with bends or L's in it make sure you measure down the center of the port and not the walls because you can be thrown off quite a bit if you dont. [/QUOTE]

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