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SA12. Box design with or without subwoofer displacement?


KMS

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In the process of building an enclosure for a SA12. In torres, I have implemented the subwoofer displacement. However. I'm not sure if I should be looking at gross volume or net volume. For instance. If I wanted to go with Jacob's recommendation of 2 cubes at 35hz. Would I be looking at 2 cubes in gross volume or net volume?

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The net volume is the usable air volume that the sub needs. Net volume doesn't include the wood (the actual box), sub displacement, bracing displacement and the port. The gross volume is the outer volume of the box, including the wood itself, net volume, sub displacement, port volume, bracing, basically everything inside the box.

Look at this box example, it shows everything on the right and you can do some calculations to see what's included and what not.

torres.jpg

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