About this item Just over a foot high, this ultra-compact monitor combines a 5-1/4-inch woofer and the Image 1-inch aluminum-dome tweeter. It is an ideally convenient surround speaker, and as a main speaker or in a secondary system, it delivers amazingly rich, detailed sound for its size and price. Impedence Nominal 6 Ohms Minimum 4 Ohms Input Power RMS, Clipping < 10% of the Time Recommended 10-80 Watts Program 60 Watts Frequency Range On Axis @ 0° ±1.5dB 70-20,000 Hz On Axis @ 0° ±3dB 50-23,000 Hz Off Axis @ 30° ±1.5dB 70-10,000 Hz Lf Cutoff -10dB 50 Hz Brand PSB Speaker Type Surround Sound Item Weight 27 Pounds Color Black Impedance 6 Ohm