High-Resolution Floor-Standing Loudspeaker for Hi-Fi Listening and Home Theater. Enjoy movies, music and gaming with high-resolution, room-filling, cinematic sound and effortless bass. Polk’s high-performance ES50 floor-standing loudspeaker is Hi-Res Audio Certified, Dolby Atmos and DTS:X compatible, and features a Dynamically Balanced acoustic array, precision crossovers and Power Port bass-enhancement.