Nominal power: 250WMaximum power: 500WSensitivity: 90.9dBCone: PolypropyleneSurround: ButylNom. impedance: 4 OhmsDC resistance: 2x2.4 OhmsVC diameter: 50mm 2"VC height: 25mm 1"Former: KaptonLayers: 4Wire: CopperInductance: 0.27mHXmax: 7.5mm 05/16"Magnet d x h: 145x32mm 511/16x11/4"Magnet weight: 1600g 3.53IbFlux density -Gap height: 8mm 05/16"Net weight: 4900g 10.8Ib