Voice Coil TypeDual Voice Coil Size12" Subwoofer TypeStandard Nominal ImpedanceDual 2-Ohm Voice Coil Diameter2" (51mm) Speaker ConnectorDual 12 AWG compression Fs (Hz)34.6 Sd (cm2)539.1 Le (mH)3.9 Re (Ohms)3.80 Qts0.58 Qes0.62 Qms8.29 Vas (Liters)66.4 SPL (dB @ 1w/1m)88.7 Xmax (mm)6.5 Power Handling (Watts RMS)250 Watts RMS 500 Watts Max Cutout Diameter11.25 in. (285 mm) Mounting Depth5.067 in. (128 mm) Magnet Weight (oz)47.7 oz. (1.35 kg) Woofer Displacement0.046 cu. ft. (1.3 Liters) Shipping Weight9.9 Lbs. (4.49 kg) Sealed Box Volume (Vb)1.02 cu. ft. (28.8 Liters) Vented Box Volume (Vb)1.79 cu. ft. (50.6 Liter