Impedance: 8 ohms Power Rating: 150W Maximum Power: Frequency Response: 70Hz-5kHz Voice Coil Diameter: 2", 50.8mm Depth: 5.2", 132mm Coil Construction: Copper voice coil Magnet Composition: Ferrite magnet Cone composition: Paper Cone Nominal Basket Diameter:12", 304.8mm Sensitivity: 102 Magnet Weight: 59 ounce Core Details: Non-vented core Coil Former: Polyimide former