Features 8" Midrange 1.5" Til Voice Coil Ferrite Magnet Treated Paper Cone W/ Cloth Surround Stamped Steel Basket Specifications Dynamic Power Handling: 500 Watts Nominal Power Handling: 250 Watts Impedance: 8Ω Voice Coil Resonant Frequency (fs): 74.4 Hz D.C. Voice Coil Resistance (Re): 8Ω Mechanical Quality Factor (Qms): 3.83 Electrical Quality Factor (Qes): 0.64 Total Quality Factor (Qts): 0.55 Equivalent Air Volume (Vas): 23.4 L Mass of Diaphragm/Coil (Mms): 13.4 g Force Factor (BL): 7.5 Soun