Polk Audio RM8000T Floorstanding Speaker (Single, Titanium) Single floorstanding speaker for use as stereo speaker or front channel in Polk RM series surround system Four 4.5-inch polymer cone midrange drivers and 1-inch silk/polymer composite dome tweeter PowerPort bass vent technology improves the lower midrange response for better speaker/sub blending Broad dispersion design sends well-balanced sound to entire listening area; bi-ampable 5-way binding posts Magnetically shielded against video interference; measures 6.19 x 45.12 x 7.88 inches (W x H x D); 5-year warranty