OPTIMUS 3-Way Speaker System (120-1733) Specifications Faxback Doc. # 17092 Speaker Size:.............................................4 1/2-inch Woofer 2-inch Mid-range 1-inch Tweeter Barium Magnet Weight:..............................................7.97 Oz. Power Handling:.........................................50 Watts Each (RMS) Maximum Power:...............................................100 Watts each Impedance:...........................................................4 Ohms Frequency Response:.........................................150 Hz - 20 kHz Sensitivity:..........................................................88 dB Specifications are typical; individual units might vary. Specifications are subject to change and improvement without notice.