Signa S4 | Polk Audio
Signa S4
$399.00 $349.00
$399.00 $349.00

Signa S4

Dolby Atmos 3.1.2 Sound Bar with wireless Subwoofer

Signa S4
Signa S4
Signa S4
Signa S4
Signa S4
Signa S4
Signa S4
Signa S4
Signa S4
Signa S4


“Polk Audio makes some of the best sound bars on the market, and the new Polk Audio Signa S4 lives up to your high expectations—that’s why we named it the best sound bar for your home theater.”


The Signa S4 sound bar’s advanced seven-speaker array was designed to deliver a lifelike Dolby Atmos 3.1.2 listening experience. Its dedicated center channel provides crystal clear dialogue and its optimized left and right tweeters and woofers deliver a huge, wide soundstage. Plus, dual up-firing speakers take advantage of Atmos’ height channels to send sounds over your head, rounding out your 3D sound immersion.

Every Word

Tired of riding the volume control to hear the dialogue during quiet scenes? Have trouble picking out voices when the bass kicks in? Hear every word with VoiceAdjust. This patented technology combines with Signa S4’s dedicated center channel to allow you to raise the volume of voices, making them clear and easy to understand, while leaving the rest of the soundtrack untouched.

“The Polk Signa S4 sound bar offers excellent Dolby Atmos performance and musical replay at the best price yet.”- CNET*

Optimized Sound

Sound modes optimize the Signa S4 for the best sonic experience for movie watching and music listening. Don’t worry about waking your family or neighbors during late-night binge-watching sessions. With Night Mode, one button lowers the bass while increasing VoiceAdjust so you can hear every word.

Deep Effortless

Signa S4’s powerful wireless subwoofer provides the deep, effortless bass that Polk is famous for, at loudness levels that are surprising for its size. Polk's exclusive BassAdjust mode controls bass on both the sound bar and sub ensuring seamless blending. The subwoofer connects automatically on start-up and can be conveniently placed nearly anywhere in the room. Put it up front for maximum impact or try behind the couch to feel the rumble.

“The S4 excels at transforming ordinary TV and movie viewing into an engaging experience reviewer Rob Sabin described as “highly listenable” with warm, palatable sound and punchy, defined bass.”

Sets Up In

Set up is easy: simply connect the included HDMI or optical cable (or aux-in on older TVs) for the ultimate sound quality for any TV—even the latest 8K Ultra-HD TVs. Signa S4 is pre-programmed to work with most TV remotes and it quickly pairs to your mobile device via Bluetooth to stream your favorite music. Signa S4’s low-profile design won’t block your TV or your remote. Signa S4 can be wall-mounted for flexible placement.


The Signa S4 Dolby Atmos 3.1.2 sound bar with wireless subwoofer delivers crystal clear, cinematic 3D surround sound—at an unbeatable value.

Bring the movie theater to your living room with breathtaking immersive sound.

Eleven drivers—including two dedicated upfiring height speakers—expand the sound field above and around you.

With its low-profile, wall-mountable design, the Signa S4 slips seamlessly into your setup.

Transform movie, TV, music, and game experiences with award-winning sound from an American icon.



50 years, hundreds of thousands of speakers, and countless awards later, we are still focused on our mission of giving you the absolute best sound for your money. Great Sound for All.

Why Polk
Great Sound for All

* From CNET, February 22, 2022. All rights reserved. Used under license.
** From Digital Trends. ©2022 Digital Trends Media Group. All rights reserved. Used under license.