Polk Audio RM7300 Satellite Speaker with Base (Single, Titanium) Single satellite speaker for use as front or surround channel in 6.1 or 7.1 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 sat/sub blending Sculpted anodized-aluminum enclosure with titanium finish; 5-way binding post connections Magnetically shielded against video interference; measures 5.81 x 24 x 6.62 inches (W x H x D); 5-year warranty