Maximum Power: 250W Frequency Response: 400Hz-4.8kHz Voice Coil Diameter: 1.5", 38.1mm Depth: 3.25", 83mm Coil Construction: Copper voice coil Magnet Composition: Ferrite magnet Cone composition: Paper Cone Nominal Basket Diameter:8", 203.2mm Sensitivity: 100.9 Magnet Weight: 20 ounce Core Details: Vented core Coil Former: Polyimide former