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Polk Audio Signa S4
Dolby Atmos 3.1.2 Sound Bar with Wireless Subwoofer
Enjoy the latest blockbuster releases, immersive music, and your favourite TV shows in the amazing 3D sound provided by Dolby Atmos* and the Signa S4.
- 3D Audio with Dolby Atmos & DTS:X
- VoiceAdjust™ technology
- Bluetooth
- 7 driver array
- 5.9" wireless subwoofer
- 41.2" x 3.7" x 2.4" (Bar)
Lifelike Movie Sound
Signa S4 is Dolby Atmos Certified* to immerse you in 360 degrees of surround sound. From added ambience in music to special effects flying overhead, Signa S4 provides an incredibly realistic sound environment. Plus, standard audio played through the Signa S4 can be up-mixed to create a virtualized Atmos experience. * Requires HDMI eARC connection between sound bar and TV.
Advanced 3.1.2 Sound Bar
Enjoy the latest blockbuster releases, immersive music, and your favourite TV shows in the amazing 3D sound provided by Dolby Atmos and the Signa S4. Its advanced seven-driver array and wireless subwoofer deliver a lifelike Atmos listening experience with a huge soundstage and effortless bass. With Signa S4, you’ll hear sounds flying overhead courtesy of up-firing speakers that support Atmos height channels, and any non-Atmos content you watch can also be enjoyed in a virtual Atmos experience.
Polk VoiceAdjust® - Hear 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? Polk’s VoiceAdjust™ was designed to make sure that you hear every word. This patented technology combines with Signa S4’s dedicated center channel to allow you to raise the volume of only the voices, making them clear and easy-to-understand, while leaving the rest of the soundtrack untouched.
Customisable Sound - Music, Movie, Night Modes
Late night binge-watching session? Don’t worry about waking your family or neighbors. With Night Mode, one button lowers the bass while increasing VoiceAdjust™ so you can hear every word, without raising the master volume. Plus, one-button, preset sound modes optimize the Signa S4 so you can have the best sonic experience for movie watching and music listening.
Wireless Subwoofer for Effortless Bass
Signa S4’s powerful wireless subwoofer provides the deep, effortless bass that Polk is famous for, at a loudness level that is surprising for its size. The subwoofer connects automatically on start-up and can be conveniently placed nearly anywhere in the room. Put it up front or in the corner for maximum impact or try behind the couch and feel the rumble.
Sets Up In Seconds
Set up is easy: one simple connection via the included HDMI or optical cable (or aux-in for older TVs) ensures the ultimate listening experience with virtually any TV—even the latest 8K Ultra-HD TVs. For added convenience, Signa S4 is pre-programmed to work with most TV remotes out of the box and it quickly pairs to your mobile device via Bluetooth to stream your favourite music. Lastly, Signa S4’s low-profile design won’t block your TV or your remote and can also be wall-mounted for flexible placement.
never miss a memorable moment again
Polk’s patented VoiceAdjust™ speech-clarifying technology allows you to raise and accentuate dialog without impacting the rest of the soundtrack.
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Professional Reviews 86/100
Nicely Roasted
Bass
86/100
Integration
88/100
Dynamics
84/100
Build Quality
85/100
Features Usability
88/100
Value for Money
85/100
The Signa S4 delivers a room-widening Dolby Atmos presentation with surprisingly solid bass for a compact package, while VoiceAdjust keeps dialogue crisp. Audioholics and ecoustics both highlight its easy setup, useful cable bundle, and capable movie-and-music performance, making it a smart, feature-rich soundbar for streamlined home theater.
What Reviewers Are Saying
Pros
Delivers a wide, immersive Dolby Atmos soundstage with convincing height effects for movies and TV.
Compact wireless subwoofer adds satisfying bass support, with usable low-end response down to about 40Hz.
VoiceAdjust improves dialogue clarity, making voices easier to follow at low volumes and in busy mixes.
Easy setup and useful extras like included HDMI/optical cables and TV-remote compatibility make it very approachable.
&
Cons
Lacks an extra HDMI input, which limits flexibility for connecting external sources directly to the soundbar.
Does not offer separate height-channel level control, so Atmos tuning is less adjustable than some rivals.
No support for optional wireless surround speakers, which caps expansion options.
Assessments of Build Quality, Usability, and Overall Propositions.
Bass
86/100
Reviewers describe the compact wireless subwoofer as giving the Signa S4 a good bass complement, with audible low-frequency response down to about 40Hz before dropping off. The bass is called satisfactory for this modest system and good overall, which fits a small bundled subwoofer that aims for convincing home-theater support rather than deep-rumble excess.
Integration
88/100
The bass is presented as a complement to the system rather than something that dominates it, and the reviewer’s overall movie-and-music comments suggest a coherent, easygoing blend. That said, the excerpts focus more on the subwoofer’s output than on explicit outcome language like disappearing into the front speakers, so the integration praise is positive but not especially detailed.
Dynamics
84/100
The reviews say little directly about slam, headroom, or strain under louder playback. The available comments point to a compact system that sounds good for movies and music, but there is not much direct evidence of big-scale punch or effortless dynamic drive.
Build Quality
85/100
Direct construction commentary is limited, but the reviews do note the included wireless subwoofer, the ported design, and Polk’s generally straightforward approach to setup. Beyond that, the excerpts say little about cabinet rigidity, long-term durability, or amplifier quality.
Features Usability
88/100
The Signa S4 offers practical controls and connections that reviewers specifically mention: VoiceAdjust, Bass Adjust, HDMI eARC, optical, analog, Bluetooth, USB for firmware updates, and compatibility with most TV remotes. The included HDMI and optical cable are also called out in the Audioholics excerpt, which supports the sense that setup and daily use are well thought out.
Value for Money
85/100
At roughly $399-$400, reviewers frame the Signa S4 as offering Dolby Atmos and height-channel upmixing at a reasonable price. The value language is positive but restrained: it sounds like a sensible buy for the feature set, not a dramatic bargain or a product that clearly undercuts stronger rivals.
Reviews
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- Abt Electronics — online and in-store — Glenview, Illinois, United States (website)
- Accessories 4 less — online and in-store — Apopka, Florida, United States (website)
- Acoustic Sound Design — in-store — Las Vegas, Nevada, United States (website)
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- Area Hifi — online and in-store — L'Eixample, Comunidad Valenciana, Spain (website)
- Audio Advice — online and in-store — Raleigh, North Carolina, United States (website)
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