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Fs (free-air resonance): Qts (total speaker “Q”): Qes (electrical “Q”): Qms (mechanical “Q”): Vas (equivalent compliance): Xmax (linear excursion one-way): Effi ciency (1W/1m)*: Sd (effective piston surface area): Re (DC resistance): Znom (nominal impedance): Pt (continuous thermal power handling): *Effi ciency (1W/1m) is not an accurate indicator of a subwoofer’s output capability and should not be used as a comparison to other subwoofers to determine which one is “louder”!
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•Do NOT use different impedance speakers when using multiple subwoofers! •JL Audio recommends using subwoofers as part of a bi-amplifi ed system using high quality satellite speakers like our Evolution line of coaxial and component speakers. We do not recommend the use of passive crossover components (coils) on subwoofers. These components may adversely affect the performance of a subwoofer.