Polk SIGNA S4 Dolby Atmos 3.1.2 Soundbar

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


Polk SIGNA S4 - Dolby Atmos 3.1.2 Sound Bar with Wireless Subwoofer

The Signa S4 Dolby Atmos 3.1.2 sound bar with wireless subwoofer delivers powerful, crystal clear, cinematic 3D surround sound at unbeatable value. Features VoiceAdjust and Bass Adjust technologies, as well as Night, Music, and Movie modes for customizable sound. Set up with virtually any TV by simply connecting just one cable. Enjoy Bluetooth music streaming and more.

Key Features

• Advanced 7-driver array soundbar with dual up-firing speakers
• Dolby Atmos Certified, delivers immersive 3.1.2 audio
• Deep, effortless bass from the powerful Wireless Subwoofer
• Dedicated centre channel & Polk VoiceAdjust technology to reproduce clear, crisp dialogue
• Customise your sound with Movie, Music, and Night sound modes
• Bluetooth connectivity for wireless music playback from a compatible device
• Low-profile wall-mountable design
• Single cable setup with any TV (eARC or ARC HDMI, Optical, or Aux)

User Manual (PDF, 0.8MB)

“It terms of sheer audio bang for your buck, it doesn't get much better than the Polk Signa S4 soundbar.”

Read the full review at Digital Trends

“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.”

Read the full article at Rolling Stone, Best Dolby Atmos Soundbars 2022

True Dolby Atmos Surround 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 a stunning, incredibly realistic sound environment with a full feature set to match.

Advanced Seven-Driver Array

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 centre 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.


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.

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? Hear every word with VoiceAdjust. This patented technology combines with Signa S4’s dedicated centre 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.


Optimised Sound Modes

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 neighbours during late-night binge-watching sessions. With Night Mode, one button lowers the bass while increasing VoiceAdjust so you can hear every word.

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 favourite music. Signa S4’s low-profile design won’t block your TV or your remote. Signa S4 can be wall-mounted for flexible placement.


Polk - 50 Years of Engineering the Perfect Home Theatre Sound

Trust your sound to the speaker experts. For more than five decades, Polk has led the way in innovating speakers that provide great sound at an accessible price. 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.

Model Number SIGNA S4


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)

(1) HDMI (eARC)
(1) Optical input
(1) Analog 3.5mm input
(1) USB-A (for firmware updates)

Dimensions (W x D x H): 1046 x 95 x 60mm



Woofer: (1) 5.9” / 15cm (Round)

Dimensions (W x D x H): 200 x 328 x 280mm


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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2 Years
This Polk product includes a 2 Year Australian warranty.

If you experience any issues with this product please don't hesitate to contact us.
How much does delivery cost?
We offer free post on all orders over $29 to anywhere within the Australian mainland and Tasmania.

Can I pick up my purchase from your store?
Yes. You can usually pick up your order from one of our stores. We recommend that you contact us first to ensure your order is ready for collection.

What happens if I'm not happy with my product when it arrives?
All change of mind returns must be in as new condition, in original packaging. We provide a generous 30-day change-of-mind guarantee on our products (unless otherwise stated). All change of mind returns must be in as new condition, in original packaging.

Please visit our FAQ page for answers to other frequently asked questions or contact us if you have any other questions or comments.