Polk Reserve R350 Slim Center Channel Speaker for Immersive Audio Performance. The Polk Reserve R350 Center-Channel Speaker is a unique loud speaker in the series that serves as both, a center-channel & L/R surround sound speakers to deliver ultra-clear highs, detailed midrange, and effortless bass. It features a 1" Pinnacle Ring Radiator Tweeter and four 4" Turbine Cone Woofers with Hi-Res Audio Certification, Dolby Atmos, and IMAX Enhanced support. Whether you're listening to music, watching movies, or playing video games, the R350's cross-braced cabinets minimize interior resonances and acoustically inert anti-diffraction magnetic grilles offer a clean aesthetic without sacrificing sound quality. The premium, large 5-way binding posts ensure an easy and efficient setup with loss-less connection. Place this slim center speaker on a stand, shelf, tabletop, or mount it on the wall using the pair of mounting brackets. Pair it with two R100 or R200 bookshelf speakers, and two R600 tower speakers or with two more R350s as L/R surrounds, and add R900 height module for depth (all sold separately) to create a multichannel surround sound system. The R350 is compatible with the latest file formats like DSD, FLAC, WAV, ALAC, and MQA, so you can experience superior audio performance at home.