JBL Stadium 102SSI - 25cm Subwoofer • Peak Power: 1350 watts • RMS Power: 450 watts • Glass Fiber and Pulp/Kevlar Cone • Nitrile Butadiene Rubber NBR Surround • Impedance: Dual 2 or 4 ohms • Mount depth: 6 1/4", • Sensitivity: 91 dB Product Details:10", Dual 2 or 4 ohms JBL Stadium Series SubwooferPower Handling: Peak: 1350 wattsRMS: 450 watts Glass Fiber and Pulp/Kevlar ConeNitrile Butadiene Rubber NBR SurroundStamped steel vented basket3", High Temperature Voice coil10.25 mm Xmaxmagnet motor structureFrequency Response: 30 - 175 HzResonance Frequency (Fs):Sensitivity: 91 dBSealed box volume: 0.8 cubic feetPorted box volume: 1.5 cubic feetTop-mount depth: 6 1/4",Cutout diameter: 8-15/16",