Price Match Guarantee Polk Signature Elite ES20 Bookshelf Speaker (Pair) Enjoy movies, gaming, and multi-channel music in high-resolution cinematic sound with Polk's full-range ES20 wall-mountable, compact surround loudspeaker. Featuring a Dynamically Balanced acoustic array with a 1" High-Resolution Terylene Tweeter, a 6.5" Mica-Fortified Polypropylene Woofer, and Precision Crossovers, the ES10 delivers crystal-clear, highly detailed sound with the energy of live music - no matter what you're l