How to Build a Sound Box


A sound box increases the bass response of your stereo speakers. You can build a custom box that fits with your decor by the instructions that follow. Make your media room look and sound great.

Things You'll Need

  • Speakers.
  • Speaker Jack.
  • Speaker wire.
  • Plywood.
  • 1X1 sticks.
  • Wood Glue.
  • Wood Screws.
  • Upholstery.
  • Saw.

Put The Boom Boom In Your Media Room

  • Measure the size of your woofer. Cut two squares of 3/4 inch plywood that extend about 4 to 6 inches out from the speaker. You can mount two speakers to a box, but you need to map it out better. You will mount the speaker in one and the other will be the back of your sound box. You will need a saw that can cut a circle matching the diameter of the inside of the speaker flange. Mark the center of one board and pencil the outline before cutting. You may need to do some chiseling and sanding to fit the speaker just right. You can place the speaker to see if it fits, but don't mount it yet.

  • Cut a 3 inch vent hole near a bottom corner of the speaker board. This will allow the reverberating sound of the box to project forward.

  • Cut a hole in the back panel to mount a speaker plug.

  • Cut the four sides of your sound box. Make them 12 to 16 inches by whatever the size of your front and back panels are. Screw and glue the four sides on to the back panel.

  • Cut the 1'x1's to size. Run them along the inside seams for added support where the sides meet. Screw and glue them into place.

  • Mount the front panel without the speaker.

  • Finish the exterior to taste. You can just finish the wood itself or upholster it.

  • Mount the speaker jack and wire it to the speaker then mount a speaker grill to protect it.

  • Mount the speaker in the box. If the speaker does not have a gasket, cut some felt padding to make one and glue it in place. That will prevent vibrations between the speaker frame and the box.

  • Place and plug! Place your new sound boxes according to your listening area and plug them in. Sit back to enjoy the beauty and the sound.

Tips & Warnings

  • Buy more wood than you need in case of mistakes.
  • Before mounting the speaker to the Box, plug in the Box with the speaker wired and test to see if you get sound.
  • Be careful with sharp tools around you and the speaker.

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