Features: Specifically designed for high SPL performance DVVC Direct Vent Voice Coil Cooling Cross drilled front plate venting Aluminum shorting ring for reduced inductance Foam surround Rigid paper cone Progressive spider Diecast basket Single Sided compression terminals Size: 12 Inch Voice coil: DUAL 4Ω RMS/PEAK: 750/1500 Watts SENS: 85.15 dB DEPTH: 6.23 Inch CUT OUT: 11.34 Inch Thiele Small Parameters: Resonant Frequency (fs): 30.8 Hz Mechanical Q (Qms): 6.69 Electrical Q (Qes): 0.594 Total Q (Qts): 0.545 Sensitivity: 85.15 dB Xmax Linear: 0.51 in Displacement: 0.16 cf Air Volume of Suspension (Vas): 1.47 cf Moving Mass (Mms): 255.75 g Suspension Compliance (Cms): 0.104 mmN Effective Piston area (Sd): 530.93 SqCm Motor Strength (Bl): 9.165 TM DC Resistance: 1 Ohms Voice Coil & Magnet: Impedance Series: 4 ohms Impedance Parallel: 1 ohms Voice Coil Diameter: 2.5 in RMS Power: 750 watts Peak Power: 1500 watts Magnet Weight: 120 oz Magnet Diameter: 6.69 in Physical Dimensions: Mounting Depth: 6.23 in Cutout Diameter: 11.34 in Frame Outside Diameter: 12.94 in Enclosure Recommendations: Single Sub Sealed: 1.5 cf Dual Subs Sealed: 2.7 cf Single Sub Vented: 2.5 cf Port Dimensions: 5" x 5" x 27"L in Tuning Frequency: 36 Hz Dual Sub Vented: 4.6 cf Port Dimensions: 7" x 6" x 23"L in Tuning Frequency: 36