Optimus-990 Speaker System (400-1125) Specifications Faxback Doc. # 9564 Frequency Response:...........................................50-20,000 Hz Power Handling Capacity:.........................................100 Watts Sensitivity:............................................90 dB SPL at 1W/1M Impedance:..........................................................8 Ohms System Resonance:....................................................80 Hz Speaker Components:...............15-inch (38.1 cm) High-Compliance Woofer Wide-Dispersion Horn Tweeter Enclosure:..................Tuned Port/Bass Reflex Design Removable Grille Dimensions:..........................24 7/8 x 17 3/8 x 10 7/8 inches (HWD) (63.2 x 44.1 x 27.6 cm) Weight:...................................................35.2 lbs (16 kg) (ALL-01/31/95)