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October 13, 2023

Polk True Surround II 5.1 Channel Wireless Surround Sound System Review

In the days when immersive audio standard Dolby Atmos was a rarity, getting a surround system up and running could be an intimidating task, even for hardened AV geeks. It involved a central receiver, loads of weird formats and miles and miles of speaker wire.

But the advent of affordable soundbars that support Atmos has made it a whole lot easier to achieve an immersive movie or music experience, and without requiring a separate AV receiver or a stack of speakers. The Polk Signa S4 is the cheapest true Atmos soundbar I've seen, and it performs well for both movies and music.

Its five speakers hide beneath a dark grey material weave, with two tweeters on either side and three mid-range speakers sitting left, right and centre. The soundbar also has built-in wireless subwoofer, and its setup is relatively easy – it pairs with any TV via an included cable, then uses an easy button-based system to sync the surround speakers and subwoofer.

Streaming is supported via Wi-Fi – with Apple AirPlay 2, Google Chromecast and Spotify Connect – as well as Bluetooth. And there's a USB port for firmware updates. The system's built-in sound modes – Movie, Music and Night – are useful, although they do not allow you to tailor individual channels, which is an option available on other soundbars such as the Zvox React.

This is a solid and simple soundbar that's great value, but I do prefer its competition, such as the Sonos Arc and Vizio M512a. The Polk React trades Atmos for Alexa, while the MagniFi Mini AX is a similar package that can be upgraded to 5.1 with bundled SR2 speakers, for less money.