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Subwoofer Box Dimension Calculator

 This page is designed to help you determine the proper dimensions for a speaker enclosure. There are some ratios which are typically used to determine an enclosure shape that will help to minimize standing waves in the familiar rectangular speaker box. Never build a cube shaped box, which is the absolute worst enemy of a smooth frequency response curve.
Subwoofer Enclosure with correct proportions
The "Golden Ratio"
 To use this calculator, enter the volume of your enclosure (in cubic feet) in the first box. Then click the "Dimensions" button to see the proper internal dimensions for your new speaker box design.
Box volume =  (Ft3) Depth = inches
Height =  "
Width = "
Total =  (Ft3)
 Due to rounding, the total number shown above will come out smaller than the value you entered. This is normal. This calculator is only intended to give you some "ballpark" figures to use in the calculator below.
  

 

The Actual Box
 To use this calculator, add a little bit to the dimensions from the calculator above. Then click the "Box Volume" button to see the volume obtained from these dimensions. You won't need to re-enter all the values to re-calculate, you can change only one or as many as you desire. Then click the button again to calculate another time.

Inch MeasurementDecimal Equivalent
1/160.0625
1/80.125
1/40.250


Depth = inches
Height =  "
Width = "
Box volume =  (Ft3)

 Due to rounding, the total number shown above will come out smaller than the value you entered. This is normal. This calculator is only intended to design a speaker box with the correct proportions in an easy to build shape.

  


 

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