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Polk Audio Signa S4 Dolby Atmos 3D Sound Bar System with 5.9" Wireless Sub
Polk Audio

Signa S4 Dolby Atmos 3D Sound Bar System with 5.9" Wireless Sub

By SpecPicks Editorial · Verified 2026-08-21

$449.00
Buy on Amazon — $449.00 Compare to similar sound cards

*Price sourced from Amazon.com. Last updated 2026-08-21. Price and availability subject to change.

Bottom line: The Signa S4 Dolby Atmos 3D Sound Bar System with 5.9" Wireless Sub is a niche pick — read recent reviews before buying in the sound cards category, priced around $449.00. Read recent reviews carefully before committing.

The low-profile Signa S4 certified with Dolby Atmos 3.1.2 sound bar comes with a 5.9" wireless subwoofer that together deliver powerful, crystal-clear, cinematic 3D surround sound with any HD TV, even the latest 8K Ultra-HD TVs, with single-remote connectivity. As a versatile entry in home audio sound bars, this streamlined unit stands just over 2", so it never blocks your TV's sensor whether you wall-mount it or place it on a shelf. Features Polk's patented Voice Adjust technology, allowing you to dial in speech while leaving the soundtrack untouched, so dialogues stay clear. Bass Adjust…

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SpecPicks Verdict

SpecPicks classifies Polk Audio Signa S4 Dolby Atmos 3D Sound Bar System with 5.9"… as a niche pick — read recent reviews before buying in the sound cards category, based on our editorial and benchmark analysis and our ranking model that weights rating × review-volume × price-fit. Polk Audio's positioning sits within the broader category mid-tier. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.

Common buyer scenarios for sound cards of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.

Pros & Cons

Pros

  • ✓ Backed by Polk Audio's warranty and support channels
  • ✓ Ships via Amazon with Prime eligibility and the standard returns policy

Cons

  • ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
  • ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified

Key Features

  • ADVANCED ULTRA-SLIM SOUNDBAR AND WIRELESS SUB - The Signa S4 Dolby Atmos soundbar, 7-driver array, & dedicated full-range center channel deliver 3D surround sound; 5.9" sub creates WIDE SOUNDSTAGE, DEEP BASS (Waterproof: No)
  • UP-FIRING SPEAKERS FOR HEIGHT ELEVATION - As well as L/R Tweeters (0.98"), (2) Racetrack Mid Drivers (4.7"x1.57") and a 0.98" Center, the L/R elevation speakers (2.59") utilize Atmos' height channels for an immersive 3D sound over your head
  • POLK’S EXCLUSIVE VOICEADJUST TECHNOLOGY - Along with S4's center channel, this lets you adjust voice levels to hear clear dialog without missing a word. For max impact, control the Bluetooth sound bar with subwoofer using Bass Adjust Technology
  • EXCELLENT SOUND AND VALUE - At par with mid to high-range soundbar with wireless subwoofer. At 2.36", the Signa S4 easily fits most spaces, including your wall or in front of your screen. It won’t block your TV’s bottom edge/ IR remote sensor
  • 1-CABLE SETUP, WORKS WITH ANY TV INCLUDING THE LATEST 8K ULTRA-HD SETS - Get these sound bars for TV up and running in under 5 minutes—all you need to do is unbox, connect and you are ready to listen. A great addition to your home theater!

Full Specifications

BrandPolk Audio
ColorBlack
Model NameSigna S4
Unit Count1 Count
ConnectivityBluetooth
Model NumberSigna S4
Power SourceCorded Electric
Speaker Size2.36 inches
Speaker TypeSoundbar
Audio Latency16 milliseconds
Is WaterproofFALSE
Mounting TypeWall Mount
Warranty TypeLimited
Built-In MediaBattery, HDMI cable, Optical cable, Power cords, Quick Start Guide, Remote control with batteries, Sound Bar, Subwoofer, Wall-mount spacers, Wall-mount template

Ready to buy?

Polk Audio Signa S4 Dolby Atmos 3D Sound Bar System with 5.9" Wireless Sub is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Check price on Amazon →

*Price sourced from Amazon.com. Last updated 2026-08-21. Price and availability subject to change.

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Polk Audio Signa S4 Dolby Atmos 3D Sound Bar System with 5.9" Wireless Sub
$449.00
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