Model No: PA-18 Description: 18" Nominal Impedance: 8ohms Frequency Response: 28-1500HZ Power Handling(Continuous): 600 watts Power Handling(Peak): 1200 watts Sensitivity:97.0 dB Voice Coil Diameter: 4" Magnet Weight:122.8 OZ Net Weight: 12.19 kg(26.82 lbs) Bl: 21.13 TM Vas: 200.62 L Qts: 0.42 Mounting Depth:8.87"(225.39mm) Mounting Diameter: 16.71"(424.5mm)