About this item: 
HIGH-PERFORMANCE BOOKSHELF SPEAKER - Polk Signature Elite ES20 features Dynamically Balanced Acoustic Array with Precision Crossovers, a 1" Terylene Tweeter and a 6.5" Woofer that deliver room-filling, crystal clear sound in a life-like soundstage 
NOT ONLY HEAR, BUT FEEL THE HEART-THUMPING BASS - Polk's Patented Power Port Technology delivers 3dB louder bass output than conventional ported speakers, minimizing turbulence & distortion so you do not miss any detail in your movies, music, and games 
REALISTIC SOUND REPRODUCTION - ES20's high sensitivity and 4- & 8-Ohm compatibility delivers spacious, enveloping and true to life music streamed online via Apple Music, Amazon Music HD, Spotify & more and even from the latest Dolby Atmos & DTS:X AVRs 
LOOKS TO KILL - The Signature Elite series speakers with their bold, modern looks are sure to make heads turn and set feet tapping, no matter where you are sitting in the room. Their elegant and classy style will make a statement with any home décor 
MAXIMUM PLACEMENT VERSATILITY- Place it on the sideboard, a bookshelf or a speaker stand (sold separately) and use ES20 as side, rear or elevation surround speaker for a true cinematic experience 
BUILD YOUR DREAM HOME THEATER - The timbre matched Polk components ensures seamless speaker-to-speaker blending with the Signature Elite series. Add a pair to the ES50 tower pair, ES30 center channel & any sub for a full 5.1 surround setup