2-way, tuned-vent bookshelf speakers with wide, 43 to 20,000 Hz frequency response for deep bass and extended treble90 dB sensitivity; recommended for use with amplifiers pushing 10 to 150 watts per channel6-inch poly/graphite woofer, .75-inch poly dome tweeter per speakerVideo-shielded for distortion-free placement near televisions or computer monitorsMeasures inches 8.9 x 14.8 x 9.1 (W x H x D) each