Features Specifications Size - 8" Impedance: 4Ω Nominal Power - 75 Watts Dynamic Power - 350 Watts Resonance 90 Hz Sensitivity: 93.4 dB Voice Coil Diameter: 1.5" Sold As - Pair Driver Composition Voice Coil Wire: CCAW Magnet: Ferrite Basket: Stamped Steel Cone: paper Cone Edge: cloth T/S Parameters Resonant Frequency (fs) 90 DC Resistance (RE) 3.2 Coil Inductance (LE) 0.00mH Mechanical Q Qms) 5.55 Electromagnetic Q (QES): 0.75 Total Q (QTS) 0.66 Compliance Equivalent volume (VAS) 14.9 Mechanical