KMS Posted July 25, 2015 Report Posted July 25, 2015 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? Alpine PDX-V9 Morel Tempo 6 Alpine SBR-S8-4 Alpine CDE 149BT
Triticum Agricolam Posted July 25, 2015 Report Posted July 25, 2015 Net. The only volume the sub cares about is net volume. "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds:
alex912005 Posted July 25, 2015 Report Posted July 25, 2015 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. My Build Log
Joe X Posted July 25, 2015 Report Posted July 25, 2015 Net volume is after all displacements so: gross volume - port displacement - driver displacement = net volume.
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