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Need design help fast

Old 08-16-2011, 09:54 PM
  #1  
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Need design help fast

My design software won't work for some reason so I need help fast. I have one 12" JBL Gti MKii. Vented box, 1.5 ft3. 3" dia port.

I need the port length.
Tuned to 40hz


Thanks,

John
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Old 08-16-2011, 11:15 PM
  #2  
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http://www.psp-inc.com/tools.html
Use that

Straight length port required= 5.742749 inches

Flare length port required= 6.742749 inches

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