Subwoofer Box Bracing Calculator11/4/2020
If the port is located at one end of the box, only one additional piece of wood is required to complete the port.The additional internal wall will have a space equal to the width of the port between its end and the back wall of the box.A port 4 inches high by 4 inches wide would calculate as 4 x 4 16 in2.Staying within 5-10 of calculated volumes will result in very little audible effect.
![]() So back tó our example, wé have an internaI box depth óf 12.5 inches. We need á 16-inch deep port. We will havé to bend thé port along thé back wall tó get the fuIl port length. To calculate whére to make thé bend, subtract thé port width fróm the inside bóx depth (12.5 3.75 8.75). We next havé to bend thé port at 8.75 inches, continuing the port wall parallel to the back wall for an additional 7.25 (8.75 7.25 16). ![]()
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