EBP or Efficiency Bandwidth Product is calculated by dividing Fs (free air resonant frecuencies) by Qs (total Q of the driver). The EBP figure is used in many enclosure design formulas to determine if a speaker is more suitable for a closed or vented design. An EBP close to 100 usually indicates a speaker that is best suited for a vented enclosure. On the contrary, an EBP closer to 50 usually indicates a speaker best suited for a closed box design.
