Custom Ported Subwoofer Box Design - 5.544 Ft3 Slot Port Enclosure Tuned to 34 Hz

This document is a screenshot of an online subwoofer enclosure (speaker box) design calculator, uploaded as a blueprint for a custom sub box. The left side lists the user-entered parameters and calculated results for a ported (slot/square port) enclosure: Box Width 38, Box Height 18, Box Top Depth 20, Box Bottom Depth 20, and Wood Thickness 0.75 inches. Port specifications include Square Port Height 16.5, Square Port Width 4.25, Square Port Length 1 of 15, Square Port Length 2 of 0, giving a Total Port Length of 22.125, an equivalent Square Port Diameter of 9.449122873, and a Square Port Area of 70.125. Calculated volumes are: Square Port Volume Internal 1551.515625, Square Port Volume Displaced 1562.203125, Box Volume 5.544 cubic feet (9579.421875 cubic inches), with a Tuned Frequency (Fb) of approximately 34.26 Hz. Required fields are marked with an asterisk. The right side shows a 3D wireframe rendering of the rectangular enclosure with the internal port wall visible. Partial text at the bottom recommends building the box from MDF. The document is not vehicle-specific; it was filed in a 1992 Ford Crown Victoria gallery, presumably as the design for a sub box installed in that car.