Signa S4



Enjoy the latest blockbuster releases, immersive music, and your favorite TV shows in the amazing 3D sound provided by Dolby Atmos* and the award-winning Signa S4.

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

Signature Polk sound

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.

Deep Effortless Bass

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.

Sets Up In Seconds

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.

Key Technologies

Dolby Atmos is a revolutionary spatial audio technology for the most immersive sound experience

Connect and play music directly from your smartphone, tablet or other compatible device.

eARC (Enhanced Audio Return Channel) makes playing TV audio simple with a single HDMI connection. eARC supports HD and 3D audio formats such as Dolby TrueHD, DTS HD Master Audio, Dolby Atmos and more.

Connect your audio source, such as a TV, Blu-ray player, or game console using an optical cable. This digital connection ensures high-quality audio transmission, delivering clear and accurate sound.

Connect audio sources such as smartphones, tablets, or MP3 players using a standard 3.5mm auxiliary cable. The aux input provides a simple and versatile way to play audio from your portable devices.

Adjust the vocal levels from the sound bar with Polk Voice Adjust technology for clear, easy-to-understand dialogue.

One-button presets for movie watching and music listening, along with Night Mode—so you won’t wake the neighbors or kids during late-night bingewatching sessions.

Proudly engineered and designed in Baltimore, Maryland, Polk products are crafted to meet high standards of quality, performance, and reliability, ensuring a premium audio experience that is the pinnacle of American Hi-Fi.


Powerful Home Cinema

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

It’s never been easier to fill your room with sound, without filling your room with speakers.

Leveraging 50 years of Polk hi-fi engineering innovation, Signa S4 is designed to deliver and built to last.

Signa S4

Details &

  • Sound Bar: 41.2 x 3.7 x 2.4”
    1046 x 95 x 60mm
  • Subwoofer: 7.9 x 12.9 x 11.0”
    200 x 328 x 280mm

  • Sound Bar: L/R Tweeter: (2) 1” / 25mm (Round)
    L/R Mid: (2) 4.7 x 1.6” / 120mm x 40mm (Racetrack)
    Full Range Center: (1) 1” / 25mm (Round)
    L/R Elevation: (2) 2.6” / 66mm (Round)
  • Subwoofer: Woofer: (1) 5.9” / 15cm (Round)

  • Inputs (1) HDMI (eARC)
    (1) Optical input
    (1) Analog 3.5mm input
    (1) USB-A (for firmware updates)
  • What’s in the Box: • Sound Bar
    • Subwoofer
    • Remote Control
    • Sound Bar Power Cord
    • Subwoofer Power Cord
    • HDMI Cable
    • Optical Cable
    • 2x AAA Batteries
    • Quick Start Guide
    • Registration Card
    • Safety Card
    • Wall Mount Template
    • Wall Mount Spacers
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