Nominal power 300W RMS Maximum power 600W Sensitivity (2.83V/1m) 85dB Cone Flax Surround Rubber Nom. impedance 4Ohms DC resistance 3.7Ohms VC diameter 50mm 2" VC height 35mm 13/8" Former Glass Fiber Layers 4 Wire Copper Inductance 2.7mH Xmax 14mm 09/16" Magnet dxh (mm) 145 x 40mm 511/16" x 19/16" Flux density 0.75T Gap height 8mm 05/16" Net weight 5,400g 10.8 lbs S