Polk Audio RM40T Floorstanding Speaker (Single, Pewter) Single floorstanding speaker for use as front channel in Polk surround speaker system Dual 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 slim tower/sub blending Sculpted anodized-aluminum enclosure with pewter finish; 5-way binding post connections Magnetically shielded against video interference; measures 5.8 x 36.5 x 6.62 inches (W x H x D); 5-year warranty