How to Make a Kicker 12-Inch Subwoofers Box

Written by ryan carter
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How to Make a Kicker 12-Inch Subwoofers Box
Requiring more power than what the vehicle's stereo is able to produce, subwoofers must be connected to an external amplifier. (Hemera Technologies/ Images)

A subwoofer reproduces the lowest frequencies broadcast from your vehicle's stereo. Installing two Kicker 12 inch subwoofers in a box, also called an enclosure, and adding it to your vehicle's stereo system will dramatically increase the level of bass you are able to hear. With the right tools and the ability to calculate the space needed, you can build your own subwoofer enclosure.

Skill level:

Things you need

  • Tape measure
  • Medium density fiberboard
  • Table saw
  • Pencil
  • Jigsaw
  • Speaker terminal cup
  • Screwdriver
  • Wood glue
  • 2-inch drywall screws
  • Silicone caulk
  • Caulking gun
  • 14-gauge speaker wire

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    Determine Box Size

  1. 1

    Determine the size of the box using the factory guidelines included in the subwoofer packaging. If you do not have the factory guidelines, you will need to determine the minimum size requirement by measuring one of the two Kicker subwoofers using a tape measure. Start by measuring the diameter of the speaker grill and adding two inches. This is the minimum height of the box.

  2. 2

    Determine the minimum width of the box. To accomplish this, multiply the measurement from Step 1 by two, since there are two 12 inch Kicker subwoofers.

  3. 3

    Determine the depth of the box by measuring the length of subwoofer and adding two inches.


  1. 1

    Cut four pieces of medium density fiberboard using a table saw. Two of the four pieces should be cut according to your minimum height and width calculations. The other two pieces should be cut according to your height and depth calculations. For example, if you calculated the minimum height needs to be 14 inches, while the width needs to be 28 inches and the depth needs to be 15 inches, then cut two boards measuring 14 inches tall by 28 inches wide and two boards measuring 14 inches tall by 15 inches wide.

  2. 2

    Place the manufacturer's subwoofer template that came with your Kicker 12 inch subwoofers onto the panel that will be the front of the box. Use a jigsaw to cut out the holes where the subwoofers will be mounted.

  3. 3

    Measure the speaker terminal cup that will be used to connect the subwoofers to the amplifier using a tape measure. Cut a hole in the panel that will be the back of the box using the terminal cup measurements as a guide and a jigsaw.


  1. 1

    Mount the speaker terminal cup using the provided screws and a screwdriver.

  2. 2

    Join the four panels together using 2-inch drywall screws and a screwdriver after applying wood glue to all four edges of each panel.

  3. 3

    Seal all the edges of the box using silicone caulk and a caulking gun.

  4. 4

    Connect each Kicker subwoofer to the speaker terminal cup following the manufacturer's directions using 14-gauge speaker wire.

  5. 5

    Run a bead of silicone caulk around the two holes in the front of the box. Place the Kicker subwoofers into the holes. Push down slightly on each subwoofer. Secure the subwoofers using the provided screws and a screwdriver.

  6. 6

    Install the speaker grills using the provided screws and a screwdriver.

Tips and warnings

  • In the event that you do not have a table saw for cutting the medium density fiberboard, a circular saw will suffice.
  • Cover the box in carpeting for a more professional look.
  • Disconnect the vehicle's negative battery cable before connecting the subwoofers to the amplifier or electrical damage may occur.

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