Features 1.5" KSV voice Coil Ferrite Oxide Magnet Enhanced Midbass Wider Frequency Response Paper cone Cloth surround Sold in Single Specifications Nominal Power Handling: 175 Watts Peak Power Handling: 350 Watts Impedance: 8 Ω Resonant Frequency (fs): 106.6Hz D.C. Voice Coil Resistance (Re): 5.8Ω Mechanical Quality Factor (Qms): 4.65 Electrical Quality Factor (Qes): 0.66 Total Quality Factor (Qts): 0.58 Equivalent Air Volume to Cms (Vas): 9.1 L Cms: 0.25 mm/N Mass of Diaphragm/Coil (Mms): 8.8 g