Lifelike Movie Sound Signa S4D is Dolby Atmos Certified* to immerse you in 360 degrees of surround sound. From added ambience in music to special effects flying overhead, Signa S4D provides an incredibly realistic sound environment. Plus, standard audio played through the Signa S4D can be up-mixed to create a virtualized Atmos experience. * Requires HDMI eARC connection between sound bar and TV. Advanced Seven-Driver Array Experience Dolby Atmos 3.1.2 sound, thanks to Signa S4D’s advanced seven-speaker array with a dedicated center channel and upfiring “height” speakers for 360 degrees of sonic immersion. It’s truly cinematic sound that draws you into every song and every scene. Hear Every Word of Dialogue with VoiceAdjust Polk’s patented VoiceAdjust™ technology lets you raise the volume of speech above the rest of the soundtrack, making voices clear and easy to understand. You’ll never have to ride the volume control, and you’ll never miss a word again. Customize Your Experience with Sound Modes Signa S4D’s Music, Movie, and Night Modes optimize your sonic experience for any scenario, from movies to TV to games. Late-night binging? Your neighbors will never know: Night Mode brings down the bass while boosting dialog so you—and only you—can hear every word. Overhead Sound Amplifies Immersion Signa S4D’s two dedicated upfiring speakers deliver Atmos “height” sound, for an incredibly lifelike 360-degree sound field. Slim, Discreet, Wall-Mounted Enclosure Place Signa S4D under your TV or on the wall, for sound that you can’t miss in a speaker you barely notice. Award-Winning Sound From an American Icon Polk Audio has poured 50 years of hi-fi innovation into Signa S4D to deliver the ultimate in performance and value. Polk VoiceAdjust Technology Polk’s patented VoiceAdjust™ speech-clarifying technology allows you to raise and accentuate dialog without impacting the rest of the soundtrack. Get Ready for Bass You Can Feel Bring arena vibes to your living room with powerful, room-shaking bass, thanks to Signa S4D’s companion wireless subwoofer. Place the subwoofer anywhere in the room and use Signa S4D’s BassAdjust™ mode to dial in seamless sound balance in this perfect pairing. Hassle-Free, Clutter-Free Setup Get up and running in seconds—even with 8K Ultra HD TVs—using Signa S4D’s included HDMI or optical cable; for older TVs, simply connect your aux in. Signa S4D automatically works with leading TV remotes and effortlessly streams your favorite music via Bluetooth.