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Quick port math question
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<blockquote data-quote="mat3833" data-source="post: 8782903" data-attributes="member: 587645"><p>OK, I'm trying to help a friend out. He needs a box for a 15" driver. Here are the box dimensions:</p><p>24d</p><p>24w</p><p>15t</p><p></p><p>Internal volume equals 3.955. Minus roughly .15 for sub displacement and you get 3.805 cubes. Using a single 6" aero to get tuning in the 32hz range I'm getting multiple different answers using quick calculators. </p><p></p><p>If my volume before the port displacement is 3.805 to get 32hz tuning I need a port 15.17 inches long. Port displacement would be just about .25 cubes so I need to add just a hair to an outside dimension to compensate. </p><p></p><p>Is my math right? It's been awhile since I faffed around with port tuning.</p><p></p><p>Matt</p></blockquote><p></p>
[QUOTE="mat3833, post: 8782903, member: 587645"] OK, I'm trying to help a friend out. He needs a box for a 15" driver. Here are the box dimensions: 24d 24w 15t Internal volume equals 3.955. Minus roughly .15 for sub displacement and you get 3.805 cubes. Using a single 6" aero to get tuning in the 32hz range I'm getting multiple different answers using quick calculators. If my volume before the port displacement is 3.805 to get 32hz tuning I need a port 15.17 inches long. Port displacement would be just about .25 cubes so I need to add just a hair to an outside dimension to compensate. Is my math right? It's been awhile since I faffed around with port tuning. Matt [/QUOTE]
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