Details: video-shielded bass-reflex (ported) design frequency response 65-25,000 Hz (-3dB) handles 20-180 watts 1" Dynamic Balance® silk/polymer tweeter dual 5-1/4" Dynamic Balance polymer composite woofers 8-ohm impedance sensitivity 89 dB 5-way binding post terminals real wood veneer finish 20-1/16"W x 6-7/8"H x 9-1/16"D