HOW TO CALCULATE SPEAKER ENCLOSURE (BOX) VOLUME:

Making sure that your enclosure (box) is in the proper size is really important for your speakers and subwoofers to maximize their performance. If you are looking to build your own subwoofer box for your car, check out these basic rules you need to follow to accomplish that.

Square or Rectangular Enclosures:
Square/rectangular boxes are considered to be the easiest to calculate their volume. All what you need to do is to multiply the height, width, depth and divide that number by 1728. You need to make sure that you record the measures in inches. For example, if the sub box has measurements of 6inch high and 18inch wide and 12inch depth, then the volume will be: 1296/1728=0.75ft^3.
The below diagram shows how to measure the dimensions of the enclosure/box:


Triangular enclosures (boxes):
In-order to calculate the volume of a triangle enclosure with a right angle, all what you need to do is to multiply the height by the depth by half (1/2) of the base. Check out the below diagram for details. This type of a box is considered to be the easiest one to get the volume measured.



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