Speaker Size (In): 8 Watts RMS: 150 Watts Peak: 300 Impedance: S4 VCD (In): 1.5 Frequency Response (Hz): 100 – 15k Fs (Hz): 78 Qms: 4.56 Qes: 0.82 Qts: 0.69 Vas (Liters): 20.22 dBSPL: 96 Mounting Diameter (In): 7 Mounting Diameter (MM): 178 Mounting Depth (In): 3 9/16 Mounting Depth (MM): 91