Polk Reserve R100 Small Bookshelf Speaker with Exceptional Audio Performance The Polk Reserve R100 Bookshelf Speaker is a high-performance loudspeaker that delivers ultra-clear and crisp highs, smooth and detailed midrange, and effortless bass. It features a 1" Pinnacle Ring Radiator Tweeter and a 5.25" Turbine Cone Woofer that produce unmatched audio clarity with Hi-Res Audio Certification, Dolby Atmos, and IMAX Enhanced support. Whether you're listening to music, watching movies, or playing video games, the R100's bass reflex cabinet with a rear-firing port and Polk's Patented X-Port Technology with Eigentone Filter (ETF) ensures tight, distortion-free bass for an immersive audio experience. The premium, large 5-way binding posts ensure an easy and efficient setup with a lossless connection. Place this loudspeaker on a stand, shelf, tabletop, or any flat surface, and add another R100 speaker & pair it with two R500 towers and an R300 center channel, or pair it with three R350s as L/R surrounds and center channel, and add R900 height module for depth (all sold separately) to create a multichannel surround sound system. The R100 is compatible with the latest file formats like DSD, FLAC, WAV, ALAC, and MQA, so you can experience superior audio performance at home.