Polk Audio
POLK AUDIO SIGNAS4D
Best immersive soundbar for budget-conscious home theater enthusiasts.
Immerse yourself in cinematic audio with the Polk Audio Signa S4D sound bar system. This 3.1.2 channel system delivers award-winning Dolby Atmos sound, enhanced by upfiring speakers for true 3D immersion. Experience crystal-clear dialogue thanks to VoiceAdjust™ technology, and feel the deep bass from the included wireless subwoofer. With multiple sound modes and easy plug-and-play setup via HDMI eARC, optical, or aux, it seamlessly integrates into your home theater. Stream music wirelessly via Bluetooth for added versatility. This refurbished unit offers exceptional value and performance.
$299.00
Owner Satisfaction
4.5
/ 5
Category Rank
91
/ 704
#91 in Home Theater Systems
Price vs Category Average
-67%
Below average
Dimensions (Sound Bar)
41.23.72.4
/ " W x " D x " H
Who it's for
- Movie lovers seeking genuine overhead sound immersion
- Viewers struggling to hear dialogue in action-heavy films
- Minimalists wanting quick setup and clutter-free bass
Who should skip it
- Smart home users requiring Wi-Fi and streaming integration
- Audiophiles desiring a wide, expansive surround soundstage
- Users who prefer clear visual feedback for settings
Performance breakdown
Spatial Audio Immersion
Upfiring drivers create a convincing height layer for true Dolby Atmos.
Dialogue Clarity
VoiceAdjust technology isolates speech perfectly even during intense action sequences.
Bass Impact
The wireless subwoofer delivers punchy, room-filling low end for cinematic depth.
Setup Simplicity
Plug-and-play connectivity via HDMI eARC makes installation effortless for any user.
Design Profile
Low-profile aesthetic fits discreetly under most televisions without obstructing the screen.
Connectivity Versatility
Multiple wired and wireless inputs handle diverse home entertainment setups with ease.
Key Specs
Dimensions (Sound Bar)
41.2" W x 3.7" D x 2.4" H
System Type
Soundbar System
Audio Channels
3.1.2 system
Driver Array
7-driver array with dedicated center channel and upfiring speakers
Subwoofer
5.9" wireless subwoofer
Audio Decoding Formats
Dolby Atmos Certified
Connectivity Options
HDMI eARC, Optical input, AUX input, Bluetooth
Wireless Connectivity Standard
Bluetooth, Wi-Fi
Features
- Immersive Dolby Atmos 3D audio experience
- Crystal-clear dialogue with VoiceAdjust™
- Deep bass from wireless subwoofer
- Easy setup with HDMI eARC, optical, or aux
- Versatile Bluetooth music streaming
- Dedicated center channel for enhanced clarity
- Multiple sound modes for customized listening
- Sleek, low-profile design
What customers say
Customers overwhelmingly praise the Polk Audio Signa S4D for delivering genuine Dolby Atmos immersion and exceptional value. A key highlight is the clear, articulate dialogue, thanks to effective VoiceAdjust technology. The wireless subwoofer provides deep, resonant bass that significantly enhances the cinematic experience. Reviewers are impressed by the true up-firing drivers, which create a convincing three-dimensional soundscape. Setup is quick and hassle free, contributing to high ease of use. While musical performance is noted as good, the system truly excels in movie watching, successfully bringing premium features to the mass market with high owner satisfaction.
Know before you buy
The 3.1.2 configuration includes a dedicated center channel for clear dialogue, left and right channels for stereo sound, a wireless subwoofer for bass, and two upfiring speakers. These upfiring drivers bounce sound off your ceiling to create the height effects required for true Dolby Atmos immersion.
No, the Polk Audio Signa S4D does not support 4K pass-through. You should connect your video sources directly to your TV's HDMI ports and use the soundbar's HDMI eARC connection to receive audio from the television.
VoiceAdjust technology allows you to independently control the volume of the center channel where dialogue is primarily processed. This lets you boost speech clarity without needing to increase the overall volume of the entire system.
Yes, the soundbar is designed to be wall-mountable. Its low-profile design ensures it sits flush against the wall beneath your television for a clean, unobtrusive look.
These modes adjust the audio processing to suit your content. Movie mode enhances the surround sound experience, Music mode provides a more balanced stereo profile, and Night mode compresses the dynamic range to keep loud explosions quiet while ensuring dialogue remains audible.
Refurbished units are tested to ensure they meet the manufacturer's original performance standards. You can expect the same audio quality and functionality as a new unit, though there may be minor cosmetic imperfections.
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