Speaker Size (In): 1 Watts RMS: 50 Watts Peak: 150 Impedance: S4 VCD (In): 1 Frequency Response (Hz): 4k – 25k dBSPL: 108 Mounting Diameter (In): 2.84 Mounting Diameter (MM): 72 Mounting Depth (In): 1.6 Mounting Depth (MM): 41