Most manufacturers provide this spec in the woofer's datasheet. This is the depth of the woofer when secured to the outside of the front panel. This is the hole cutout needed to "drop-in" a woofer and secure it to the front panel. This is the number of woofers in the box. This is the thickness of a wood (MDF or plywood). Material Thickness (unit of measure - inch) Include Vb (net internal volume) + woofer/port displacement. This parameter is automatically calculated. Total Internal Volume (unit of measure - cubic feet) 4.24 до 6.00 cubic feet for one 18 inch woofer.2.47 до 4.24 cubic feet for one 15 inch woofer.1.66 до 2.75 cubic feet for one 12 inch woofer.1.20 до 1.62 cubic feet for one 10 inch woofer.0.71 до 1.17 cubic feet for one 8 inch woofer.You can use the following approximations for ported box: 2.05 to 2.83 cubic feet for one 18 inch woofer.1.34 to 2.01 cubic feet for one 15 inch woofer.0.85 to 1.31 cubic feet for one 12 inch woofer.0.46 to 0.81 cubic feet for one 10 inch woofer.0.28 to 0.42 cubic feet for one 8 inch woofer.You can use the following approximations for sealed box: It does not include any volume displaced by woofers, dividers and vents. Net internal air space available for your woofers - Vb. Net Internal Volume (unit of measure - cubic feet)
Non-editable parameters are automatically calculated. Since I've never seen two port calculators that would give the exact same port length for a given box volume and tuning frequency, the port calculations from this calculator will probably be slightly different than other calculators.Īll values rounded to nearest hundredths (x.xx). To simplify box calculations, please use our RFTECH Woofer BoxWizard to automate your volume calculations.Use the following calculators at your own risk.
For ports, braces and divider displacement, use the formulas above to calculate the volume for each piece, then subtract these from the total volume of the woofer enclosure.Īlways remember to calculate twice, cut once. Rockford Fosgate subwoofers have woofer displacement expressed in cubic feet (and liters) printed inside the owners manual. We've included some handy conversions so you can calculate between standard and metric units.ĭon't forget to subtract the "displacement volume" of the woofer and any port tubes, internal braces, etc., from the box volume. The basic formulas below will help you convert AREA of traditional rectangular boxes into VOLUME. For instance, a box with a slanting front and the other sides at right angles could be calculated by adding the volume of the rectangular part to the volume of the triangular part.Īfter calculating the basic shapes of the box, you'll need to convert AREA into VOLUME. If the box is irregular, and most are, break the interior into a collection of regular shapes, calculate the volume for each shape, and add them together. Measurements for box volume should always be calculated for the inside (Net) of the box. The formulas below will help determine area and volume for shapes commonly found in box designs. When designing speaker enclosures, you'll need to calculate box volumes.
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