LG · 2025
S95AR
Soundbar
From
$1,200
Polk Signa S4
A 3.1.2 Dolby Atmos bar with a wireless subwoofer at a modest price, with a single HDMI eARC port and no DTS.
Where to buy
List $399
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The verdict
Reviewers describe strong value for a bar with a subwoofer and Atmos height channels, with clear dialogue and good bass. It is a fit for medium rooms and TVs that have an eARC port. Those who need DTS decoding, Wi-Fi streaming or HDMI inputs on the bar should look elsewhere.
The Signa S4 is a 3.1.2-channel Dolby Atmos soundbar with a dedicated centre channel, two up-firing height drivers and a wireless subwoofer in the box. It connects through one HDMI eARC/ARC port, with optical and 3.5 mm inputs as alternatives, and adds Bluetooth, Polk VoiceAdjust for dialogue and Movie, Music and Night modes. It suits buyers who want Atmos and real bass on a budget. Caveats are no DTS support, no expansion options and a front-heavy soundstage.
Strengths
- Reviewers describe a wide, room-filling Atmos presentation with working height channels from the up-firing drivers.
- Wireless subwoofer in the box gives solid bass without extra purchases.
- Dedicated centre channel and three VoiceAdjust levels keep dialogue clear.
- One-cable HDMI eARC setup, with optical and 3.5 mm inputs as fallbacks.
- Wall-mountable, with a template and spacers supplied.
Weak spots
- No DTS support of any kind, per Trusted Reviews.
- One HDMI port with no passthrough, and no way to add rear speakers.
- Soundstage is front-heavy because there are no rear channels.
- No smart-home or Wi-Fi streaming features are listed; music is via Bluetooth.
Great for
- Budget buyers who want Dolby Atmos and a subwoofer in one box
- Medium rooms and TVs up to around 55 inches
Skip if
- Owners of DTS content who want native decoding
- People who want Wi-Fi streaming or a bar that can be expanded with rears
Full specifications
From the manufacturer unless noted. Shown for this model.
Sound
- ChannelsWritten as bar.sub.height, or total channels. 5.1.2 means five main channels, a subwoofer and two overhead “height” channels.
- 3.1.2 (Dolby Atmos)
- Subwoofer included
- Yes
- Rear speakers included
- No
- Dialogue enhancementA setting that lifts voices above music and effects, useful if dialogue is hard to follow.
- Polk VoiceAdjust (three levels), Night mode
Connections
Wireless
- Bluetooth
- Bluetooth (version not stated)
Size & placement
- Bar width
- 1,046 mm
- Bar heightIf a soundbar sits in front of a low TV stand, its height can block the bottom of the picture or the remote sensor.
- 60 mm
- Bar depth
- 95 mm
- Wall mountable
- Yes
Primary source: polkaudio.com
Setup notes
- Dolby Atmos requires an HDMI eARC connection between bar and TV, per Polk.
- Inputs: one HDMI (eARC), one optical, one 3.5 mm analogue, Bluetooth and a USB-A port used for firmware updates.
- Trusted Reviews reports Dolby Digital, Dolby Digital Plus, Dolby TrueHD and PCM are decoded, with no DTS formats.
What reviewers found
Summaries in our own words. Follow the link to read each review in full.
Finds it a capable, well-priced Atmos bar with deep bass, clear dialogue and effective height channels, though the stage is front-heavy. Criticises the lack of any DTS support and of expansion options.
Read the originalConsiders it one of the better budget bars, with a room-filling sound, strong sub and good voice clarity in noisy scenes. Notes some modes lose warmth in voices and that there are no smart-home features.
Read the original
Questions
Does the Polk Signa S4 include a subwoofer?
Yes. A wireless subwoofer with a 5.9 inch driver is included and connects automatically to the bar.
Does the Signa S4 support DTS:X?
No. Trusted Reviews reports there is no support for any DTS format, so DTS content must be converted by the TV or player.
How does the Signa S4 connect to a TV?
Through its single HDMI eARC/ARC port, with an optical input and a 3.5 mm aux input as alternatives. Dolby Atmos needs the eARC connection.
What is the Signa S4D?
Polk lists the S4D as the same 3.1.2 Atmos system in an online-exclusive finish, with the same stated bar size.
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Sources for this page
Last reviewed Nov 9, 2026. Spotted an error? Tell us.