Features 1.75" TIL voice Coil Neo Charged Ferrite Oxide Enhanced Midbass Wider Frequency Response Paper cone Cloth surround Sold in Single Specifications Nominal Power Handling: 300 Watts Peak Power Handling: 600 Watts Impedance: 8 Ω Resonant Frequency (fs): 103.1Hz D.C. Voice Coil Resistance (Re): 5.8Ω Mechanical Quality Factor (Qms): 5.54 Electrical Quality Factor (Qes): 0.57 Total Quality Factor (Qts): 0.52 Equivalent Air Volume to Cms (Vas): 14.1 L Cms: 0.16 mm/N Mass of Diaphragm/Coil (Mms)