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Old 27th April 2013, 07:48 AM   #1
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Default Port Length help?

Hi I am rebuilding my 2way ported system and adding in an extra 8 inch woofer. I have increased the box size to 14"x27"x11" being the spare MDF size I had. Equivalent to 4158 cubic inches. So I have now in each box two 8inch woofers and two tweeters.
I already have some 2" pvc plumbing pipe and thinking of using this otherwise I can get a larger size. My question being the length of this 2inch pipe. Can anyone assist in how long the port tube should be?
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Old 27th April 2013, 08:09 AM   #2
ODougbo is offline ODougbo  United States
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John,

You'll have to post 8" speaker specifications - PDF sheet, etc.
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Old 27th April 2013, 10:19 AM   #3
xrk971 is online now xrk971  United States
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If your old system was tuned correctly and all you are doing is adding a second driver, to first order, you can double the volume of the box and use two of the exact same ports. If you have speaker T/S parameters, run a program like WinISD to calculate your port length given driver params, box volume, and desired tuning frequency.
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