The volume of a rectangular box can be calculated if you know its three dimensions. The SI unit for volume is the cubic meter or m3. V A B H As a result the program calculates the total volume of a box.
Then simply multiply the 3 measurements together using the formula Volume Length Width Height.
EBP is the efficiency bandwidth product. It is used as a guide to determine whether a speaker will work better in a ported or sealed enclosure. This way itll be easier to measure the inside. Finding Volume in Liters from Dimensions.