How to Make Your Own Subwoofer Enclosure
In home theater and car audio systems, subwoofers are responsible for the reproduction of low-frequency sound. Large diameter speaker drivers are typically dedicated to frequencies below 120 Hz and are mounted and enclosed in a specially designed cabinet. These enclosures can be designed in a variety of sound-altering configurations. Airtight enclosures are popular due to their simplicity and compact design, but many system builders may choose to build a ported enclosure, incorporating an air vent to increase output.
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Things You'll Need
- Speaker driver
- Medium density fiberboard
- Plywood
- Fiberglass
- Screws
- Adhesive
- Silicon
- Jigsaw
- Sandpaper
Instructions
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Design and Assembly
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1
Find the necessary internal dimensions for the enclosure by calculating the total driver displacement. Use an enclosure calculator to find the precise values for the target system.
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2
Choose a material to construct the enclosure from. Medium density fiberboard (MDF) is a popular choice for speaker cabinets, and is often chosen over weaker plywood and particle board. Lightweight fiberglass is suitable for car audio installations.
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3
Cut panels for each side of the enclosure and test for a proper fit. Use sandpaper to smooth out any rough edges.
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4
Measure and cut out holes for each speaker driver, connection terminal and vent port. Pre-drill all screw holes for mounting. Smooth out any rough edges.
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5
Reinforce each corner with triangular wedges and thin strips of wood to prevent any flexing and vibration.
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6
Assemble the enclosure by securing each joint with coarse-pitched screws and wood glue. Fiberglass panels may be bonded with resin or plastic adhesive. Clamp each corner until the adhesives have cured. To keep the enclosure airtight, apply a bead of silicon to each interior seam.
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7
Mount all drivers, terminals and any ventilation ports. Place rubber gaskets between all hardware to reduce vibration and provide an airtight seal. Make all necessary wire connections and tightly secure all hardware.
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References
Resources
- Photo Credit 2.1 home theatre sound system. Isolated on white. image by diter from Fotolia.com
