How do I Build MTX 12 Blue Thunder Speaker Boxes?

Written by teresa rodriguez
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How do I Build MTX 12 Blue Thunder Speaker Boxes?
Blue Thunder is a well-known name in car audio subwoofers. (speaker image by Byron Moore from Fotolia.com)

MTX Blue Thunder Extreme subwoofers are component loudspeakers available in 10-inch and 15-inch sizes, as well as 12-inch diameter. All are designed specifically for car audio systems. Blue Thunder subwoofers are available with 4 and 8 ohm impedance. The 12-inch MTX Blue Thunder speaker features power handling capabilities of 500 watts, and is designed to perform in virtually any enclosure -- vented, sealed or bandpass.This MTX series is distinguished by its black die-cast aluminium frame and extreme durability and efficiency.

Skill level:
Moderate

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Things you need

  • 3/4-inch or 1-inch medium density fiberboard
  • Jigsaw
  • Marking pen
  • 2-inch drywall screws
  • Panhead sheet metal screws
  • Carpenter's glue
  • Screwdriver
  • Silicon caulk
  • Non-drying caulk

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Instructions

  1. 1

    Consult the MTX documentation that comes with the speaker to determine the specifications for the subwoofer. Every subwoofer design requires a specific sized box in order to work properly.

  2. 2

    Cut the MDF panels to size with the jigsaw. At the end of cutting, there will be a bottom panel, a back panel, two end panels, a top panel and a subwoofer mounting panel. Depending on the size of the design, an extra end-size piece can be cut for an interior brace.

  3. 3

    Cut the subwoofer opening in the panel where the subwoofer will be mounted. Outline the speaker opening on the wood surface first by tracing the speaker diameter with a pencil or marking pen.

  4. 4

    Cut an opening in the MDF for the terminal cup that provides the connections to an amplifier. This is usually the back panel for a vehicle subwoofer.

  5. 5

    Dry-fit the ends and top and bottom sections of MDF. Predrill screw holes in the MDF prior to gluing to further secure the sections. Then glue these sections together using abundant amounts of glue, and screw in the drywall screws to ensure airtight seals.

  6. 6

    Attach the speaker terminal cup within the opening for it in the back panel using drywall screws.

  7. 7

    Caulk all interior joints of the box with silicon caulk, and set the box aside to cure for 12 to 24 hours.

  8. 8

    Attach the subwoofer mounting panel to the larger box. If using dual subwoofer speakers, install an interior brace prior to connecting this panel. Glue this panel to the box, then further secure it using the drywall screws. Caulk the seams of this panel through the speaker opening, and let the caulk cure for 12 to 24 hours.

  9. 9

    Connect the subwoofer speaker terminal connections to the connection terminal tabs using the speaker wire.

  10. 10

    Mount the MTX 12-inch speaker in its cutout space. Attach the subwoofer using sheet-metal screws. You can also run a bead of non drying caulk around the basket perimeter to further ensure an airtight seal. Make the final connections to the amplifier using speaker wire.

Tips and warnings

  • Review the box specifications to ensure that the box has the correct interior volume. Any deviation from the manufacturer's or design specifications can severely compromise the subwoofer's performance.

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