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12" Single Ported Subwoofer Box Cut Sheet & Blueprint (HDS/HDC 12" Subs)
Reference · 1992-1996 BroncoAll 81 blueprints
Dimensioned build drawing for a 12-inch single-ported speaker enclosure listing each panel's cut size and the woofer cutout.
Part of 1992-1996 Ford Bronco Blueprints
This document is a builder's blueprint/cut sheet for a single 12-inch ported subwoofer enclosure. It includes two rendered diagrams: a 3D exterior view of the box showing the round woofer cutout and reference dimensions (H = 7" and I = 15 5/8" locating the woofer center), and a top-down internal view showing the port wall construction with an internal divider (E), short port panel (F), and two 45° corner braces (G). The legend lists every panel needed with quantities and dimensions: A: 2x 25 1/4" x 17 5/16"; B: 2x 25 1/4" x 12 1/2"; C: 1x 15 13/16" x 12 1/2"; D: 1x 13 1/4" x 12 1/2"; E: 1x 21 3/16" x 12 1/2"; F: 1x 2 13/16" x 12 1/2"; G: 2x 2 3/4" x 12 1/2" cut at 45°. Woofer cutout diameters are given for specific driver models: 11 1/8" for the HDS212 and 11 1/4" for the HDS312, HDC312, and HDC412. A reader can use this sheet to cut all panels and assemble the ported enclosure. This is part of an album documenting a custom stereo install in a 1994 Ford Bronco.
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Frequently asked questions
- What panel sizes are needed to build this 12" single ported sub box?
- A: 2x 25 1/4" x 17 5/16"; B: 2x 25 1/4" x 12 1/2"; C: 1x 15 13/16" x 12 1/2"; D: 1x 13 1/4" x 12 1/2"; E: 1x 21 3/16" x 12 1/2"; F: 1x 2 13/16" x 12 1/2"; G: 2x 2 3/4" x 12 1/2" cut at 45°.
- What is the woofer cutout diameter?
- 11 1/8" for the HDS212; 11 1/4" for the HDS312, HDC312, and HDC412.
- Where is the woofer cutout located on the front baffle?
- The woofer center is located 7" (dimension H) vertically and 15 5/8" (dimension I) horizontally per the diagram.
- Does this box use corner bracing?
- Yes, two G pieces measuring 2 3/4" x 12 1/2" cut at 45° are placed in the corners as shown in the top view.
- What kind of enclosure is this design?
- A single 12" ported (vented) subwoofer enclosure with an internal port wall formed by panels E and F.
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