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