Features 1.5" TIL voice Coil Ferrite Oxide Magnet Enhanced Midbass Wider Frequency Response Paper cone Cloth surround Sold in Single Specifications Nominal Power Handling: 200 Watts Peak Power Handling: 400 Watts Impedance: 8 Ω Resonant Frequency (fs): 91.7 Hz D.C. Voice Coil Resistance (Re): 5.8 Ω Mechanical Quality Factor (Qms): 4.87 Electrical Quality Factor (Qes): 0.48 Total Quality Factor (Qts): 0.43 Equivalent Air Volume to Cms (Vas): 19 L Cms: .24 mm/N Mass of Diaphragm/Coil (Mms): 12.5 g