Polk Audio Signa S4 TV Sound Bar with Subwoofer - Dolby Atmos Audio VoiceAdjust & BassAdjust Technology
Polk Audio Signa S4 TV Sound Bar with Subwoofer - Dolby Atmos Audio VoiceAdjust & BassAdjust Technology, HDMI eARC, Wireless Subwoofer works with 8K, 4K, & HD TVs, Bluetooth, Wireless Streaming
The Polk Audio Signa S4 TV Sound Bar with Subwoofer - Dolby Atmos Audio VoiceAdjust & BassAdjust Technology was $449 when we checked it on 2026-08-10. That is the median of the 8 prices we have recorded for it. Best for: A living room that wants real height channels and a separate subwoofer, with floor space for it.
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 Technology lets you tame or unleash low end on both the bar and sub simultaneously for deeper impact. Experience true 3D audio-added warmth in music, sharp effects like gunshots, or the whir of choppers o
Editor's note
This is my value pick: good virtual surround, and the included subwoofer does real work.
Why we picked it
Best for: A living room that wants real height channels and a separate subwoofer, with floor space for it.
The only pick here with real up-firing drivers and a wireless subwoofer in the box, plus a dialogue control that works.
What we like
- + Real up-firing height drivers rather than a psychoacoustic effect, which is what makes Atmos audible as height
- + Wireless subwoofer included in the box, so the low end is a separate cabinet rather than a compromise
- + VoiceAdjust raises the center channel independently, which is the actual fix for buried dialogue
- + Slim enough not to block the bottom of a television standing on a stand
Watch outs
- - Surround effects are processed rather than produced by rear speakers, so they widen rather than surround
- - The slim cabinet hardens at high volume in the midrange, which the subwoofer does not mask
- - The subwoofer needs floor space and its own mains socket, which small rooms often do not have
- - No Wi-Fi, so music from a phone arrives over Bluetooth rather than at streaming quality
- - The subwoofer pairs to the bar over its own wireless link, and re-pairing it after a power cut is a manual process
Polk Audio Signa S4 TV Sound Bar with Subwoofer - Dolby Atmos Audio VoiceAdjust & BassAdjust Technology price history
8 weekly checks of our own, from 2026-06-26 to 2026-08-10. How our price tracking works
Lowest
$336.00
Jun 26, 2026
Typical
$449.00
median of 8 weekly checks
Highest
$449.00
Jun 29, 2026
Latest
$449.00
checked Aug 10, 2026
Typical price is the median of the 8 weekly checks we have taken, not the manufacturer list price. Every discount figure on this site is measured against it.
Every observation (8)
| Date | Price | Source |
|---|---|---|
| Jun 26, 2026 | $336.00 | Weekly check |
| Jun 29, 2026 | $449.00 | Weekly check |
| Jul 6, 2026 | $449.00 | Weekly check |
| Jul 13, 2026 | $359.00 | Weekly check |
| Jul 20, 2026 | $359.00 | Weekly check |
| Jul 27, 2026 | $359.00 | Weekly check |
| Aug 3, 2026 | $449.00 | Weekly check |
| Aug 10, 2026 | $449.00 | Weekly check |
About this item
- 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:
- 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
- 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 usin
- 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
- 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
Details
- Color
- Black
- Item Dimensions D x W x H
- 3.7"D x 41.2"W x 2.4"H
- Item Weight
- 19 pounds
- Compatible Devices
- Smartphone, Tablet, Television
- Audio Driver Type
- Dynamic Driver
- Audio Driver Size
- 5.9 inches
- Brand
- Polk Audio
Polk Audio Signa S4 TV Sound Bar with Subwoofer - Dolby Atmos Audio VoiceAdjust & BassAdjust Technology: common questions
Is the Polk Audio Signa S4 TV Sound Bar with Subwoofer - Dolby Atmos Audio VoiceAdjust & BassAdjust Technology worth it?
This is my value pick: good virtual surround, and the included subwoofer does real work. Its Amazon listing shows 4.3 out of 5 stars across 1,421 ratings, which is the retailer's figure and not our verdict.
How much does the Polk Audio Signa S4 TV Sound Bar with Subwoofer - Dolby Atmos Audio VoiceAdjust & BassAdjust Technology cost?
The Polk Audio Signa S4 TV Sound Bar with Subwoofer - Dolby Atmos Audio VoiceAdjust & BassAdjust Technology was $449 when we checked it on 2026-08-10. Prices change often, so the live retailer link carries the current number.
Is now a good time to buy the Polk Audio Signa S4 TV Sound Bar with Subwoofer - Dolby Atmos Audio VoiceAdjust & BassAdjust Technology?
At $449 the Polk Audio Signa S4 TV Sound Bar with Subwoofer - Dolby Atmos Audio VoiceAdjust & BassAdjust Technology is near the median of the 8 prices we have recorded for it. The lowest we have seen is $336 on 2026-06-26, so waiting for a repeat of that would save roughly $113.
What is the lowest price the Polk Audio Signa S4 TV Sound Bar with Subwoofer - Dolby Atmos Audio VoiceAdjust & BassAdjust Technology has been?
The lowest price on our record for the Polk Audio Signa S4 TV Sound Bar with Subwoofer - Dolby Atmos Audio VoiceAdjust & BassAdjust Technology is $336 on 2026-06-26, and the highest is $449 on 2026-06-29. That record is 8 weekly checks we took ourselves.
Similar items
Logitech G Astro A50 X Multi-Platform Wireless Gaming Headset + Base Station for PS5/Xbox/PC: PLAYSYNC Video & Audio Switcher
$354.99
RØDE X Streamer X Professional Integrated Audio Interface and 4K Video Capture Card with XLR
$219.00
Canon XA70 Pro Camcorder 1" 4K UHD CMOS Sensor
$2699.00
Marshall Heston 120 Soundbar - 5.1.2 Channel | Dolby Atmos Immersive Sound and Built-in Subwoofer for TV
$1299.99
As an Amazon Associate we may earn from qualifying purchases through links on this page, at no extra cost to you. Commissions never change our picks.
$449.00 observed
Check price on Amazon →