How to Figure Cubic Feet for Speaker Boxes

A bass port is important, as it prevents the speaker from creating a vacuum inside the box.

To obtain the optimum sound quality from a speaker, it's important to ensure its housing meets certain requirements. Ensuring solid construction is essential, and providing the correct amount of air inside the box helps to isolate the speaker from the fluctuating air pressure outside the enclosure. This reduces interference in the sound generated by the speaker, and allows it to operate at its maximum efficiency.

Things You'll Need

• Tape measure
• Pen and paper

Instructions

1. Measure the height, width and depth of the speaker box using the tape measure and record the measurements with the pen and paper.

2. Multiply the height, width and depth to calculate the volume.

3. Divide the calculated volume by 1728 to convert the total to cubic feet.

References

• Crutchfield: How to Build a Subwoofer Box
• AJ Designer: Subwoofer Box Enclosure Design Calculator
• Termpro: Building a High-End Enclosure for a High-End Subwoofer System Read more: How to Build a Sub Woofer Enclosure