Brief Specifications: Xmax12 Sealed (cubic ft): 0.6 - 1.4 Vented: 1.6 - 2.25 Power Handling (RMS): 500 watts Cone Material: Carbon Fiber Magnet Weight: 96oz Sensitivity (1W/1M): 89dB Theile Parameters: Xmax12 Revc (DC VC res): 4.06 Ohms Levc (inductance@1Khz): 1.63mH Fo (Res Freq): 16.41Hz Sd (Piston Area): 0.051sq.m BL (Flux Length): 12.54TM SPLO (SPL@1W): 88dB Qms (Mech Q): 6.54 Qes (Elec Q): 0.37 Qts (Total Q): 0.35 Vas (Acous Vol): 128.911 Cms (Compliance): 347µM/N Mms (Total Mass): 135.50g Pe (Therm Power Handling): 500W Xmax (Max Excursion): 26mm Vc (Voice Coil Diameter): 2.5in Vdd (Driver Displacement): 261cu.in Mounting Diameter: 11 1/8in Mounting Depth: 6 in Enclosure Specifications: Sealed Vented Vb* Vb* Fb Vd Vl Vsealed* Xmax12 Musical 1.0 2.0 34Hz 4" 10" 1.7 SPL 0.8 1.7 40Hz 4" 8" 1.2 Bandpass Vvented* FB Vd Vl Xmax12 Musical 1.5 45 4" 8" SPL 1.55 48 4" 6"