Nominal Diameter 4 inch Nominal Impedance 4 OHM RMS Power Handling 50 Watts Maximum Power Handling 150 Watts Sensitivity 89 dB Frequency Response 115 HZ 20KHz Recommended HI Pass Crossover 120Hz Voice Coil Diameter 1 inch Voice Coil Former Material KSV Winding Material Copper Wire Cone Material Injection Surround Material Rubber Basket Material Metal Magnet Material Ferrite Magnet Weight 11 Oz Perfect blend of leading innovations and superior workmanship Manufactured to offer high value and everlasting reliability Strict quality control ensures conformance to safety standards