Impedance: 8 ohms Power Rating: 50W Maximum Power: Frequency Response: 80Hz-5.1kHz Voice Coil Diameter: 1.75", 44.5mm Depth: 6.06", 154mm Coil Construction: Copper voice coil Magnet Composition: Ferrite magnet Cone composition: Paper Cone Nominal Basket Diameter:12", 304.8mm Sensitivity: 101.4 Magnet Weight: 38 ounce Core Details: Non-vented core Coil Former: Paper former