How to Build a 4 x 12 Speaker Box

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    • 1). Measure and cut two 4-by-12-inch panels for the front and back sides of the box. Measure and cut two 3-by-6-inch panels for the sides, and two 12-by-6-inch panels for the top and bottom.

    • 2). Assemble the top, bottom and side panels together to make a hollow box, with the ends of the top and bottom panels overlapping the ends of the side panels. Spread wood glue on the panels where they meet and then screw the panels together with wood screws spaced every 2 inches.

    • 3). Cut two openings in the front panel with your jig saw, using the speakers as a template. The center point of each speaker's opening should be 4 inches in from the side of the box, and the openings centered top to bottom. Place the speakers into the openings and screw them in place with screws in the speaker mounting tabs.

    • 4). Place the front panel onto the box, fastening it in place with wood glue and screws spaced every two inches.

    • 5). Drill two holes in the rear panel, in line with the openings in the front panel. Attach a length of speaker wire to each of the speaker's terminals and feed the wire through the holes in the rear panel. Attach the rear panel to the box with wood glue and screws.

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