5
Enclosure Volume
To work out the volume required for your enclosure please refer to recommended
enclosure volumes speci
fi
ed for your Subwoofer. These are listed in cubic feet. To
convert cubic feet to litres multiply the cubic feet by 28.3. If you use this formula calculating
your enclosure size will be easy .1 cubic foot is expressed as 12” x 12” x 12” = 1728 cubic
inches
If we require a volume of 2.5cuft then we multiply this by 1728 2.5 x 1728= 4320 cubic inches. We now take
2 known enclosure dimensions that we will use, e.g height and width and divide this
fi
gure by them which will
give us the depth, for example our height is 15”, our width is 20”. So our depth is 14.4” for this enclosure.
NOTE: THIS FORMULA IS FOR THE INTERNAL DIMENSIONS, PLEASE ADD THE THICKNESS OF
THE MATERIAL USED TO CONSTRUCT THE ENCLOSURE TO THE FORMULA TO GIVE YOU THE
OUTSIDE DIMENSIONS.
So assuming we are using 1 inch material we need to add 2 thicknesses to each internal dimension to allow
for material top and bottom, so the external dimensions for this enclosure would be 17 x 22 x 16.4 inches.
The displacement of the woofer must also be added to the required volume before you calculate the
required sizes needed to build your enclosure.
