Impedance: 8 ohms Power Rating: 75W Maximum Power: Frequency Response: 70Hz-5kHz Voice Coil Diameter: 1.5", 38.1mm Depth: 4.3", 109mm Coil Construction: Copper voice coil Magnet Composition: Ferrite magnet Cone composition: Paper Cone Nominal Basket Diameter:10", 254mm Sensitivity: 100 Magnet Weight: 30 ounce Core Details: Non-vented core Coil Former: Polyimide former