BIC AMERICA RTR-1530 15-Inch 3-Way Floor Standing Speaker (BIC AMERICA RTR1530) 10W-325W per channel 15" woofer 4" wide-dispersion midrange Black laminate finish MDF construction with vent Recommended Power: 10 Watts to 325 Watts per Channel 3-Way Tower with Heavy Duty 15 Woofer 2-1/2 Fluid Cooled Tweeter and 4 Wide Dispersion Midrange Frequency Response (+ / - 3dB): 33Hz - 19kHz Sensitivity : 90dB