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Polk Audio Signa S2 vs Sonos Arc
Side-by-Side Comparison
Products
Polk Audio Signa S2
Sonos Arc
Tested using Methodology v1.1
Updated May 09, 2025 01:09 PM
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Amazon.comTested using Methodology v1.3
Updated Nov 28, 2024 02:21 PM
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Amazon.com
Channels2.1
Channels5.0.2
Variants
- Signa S2 (Black)
- Signa S2D (Black)
- Arc (Black)
- Arc SL (Shadow Edition)
- Arc (White)
Our Verdict
Polk Audio Signa S2
Sonos Arc
The standalone Sonos Arc is a better soundbar than the Polk Audio Signa S2. The Sonos is better built, and it supports Dolby Atmos content. It has better center, surround, and soundstage performances and has built-in voice assistant support. It also comes with a room correction feature. However, unlike the Sonos, the Polk comes with EQ presets.
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Black
Signa S2
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Amazon.comBlack
Arc
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Amazon.comBlack
Signa S2D
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Amazon.comShadow Edition
Arc SL
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Amazon.comWhite
Arc
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Amazon.comMain Differences forMixed Usage
Mixed Usage
Threshold
Mixed Usage
6.6
7.4
Height (Atmos)
0.0
6.1
Center
5.8
7.8
Surround 5.1
3.3
5.7
Audio Format Support - ARC
6.1
9.6
Stereo Soundstage
7.0
8.0
Full Comparison
Design
Style - Bar
Style photo - bar
Style - Subwoofer
Style photo - sub
Sub Wireless
Yes
No
Enclosure
Ported
No Subwoofer
Style - Satellites
Style photo - satellites
Satellite Wireless
No
No
Dimensions - Bar
Dimensions photo - bar
Width
35.4" (89.9 cm)
44.9" (114.1 cm)
Height
2.0" (5.0 cm)
3.4" (8.7 cm)
Depth
3.1" (7.9 cm)
4.7" (12.0 cm)
Dimensions - Subwoofer
Dimensions photo - sub
Width
6.7" (17.1 cm)
N/A
Height
13.7" (34.9 cm)
N/A
Depth
12.3" (31.3 cm)
N/A
Dimensions - Satellites
Dimensions photo - satellites
Width
N/A
N/A
Height
N/A
N/A
Depth
N/A
N/A
Mounting
Bar Mounting Holes
Satellite Mounting Holes
Mountable Bar
Yes
Yes
Bar Brackets Included
No
No
Mountable Satellites
No
No
Satellite Brackets Included
No
No
Build Quality
7.0
8.0
Build quality photo
In The Box
In The Box photo
Sound
Stereo Frequency Response
7.2
7.2
Stereo Setup
Raw Frequency Response
Frequency Response Small
Channels
2.1
5.0.2
Tested Preset
Music
No Preset
Slope
-0.44
0.37
Standard Error
3.26 dB
3.33 dB
Low-Frequency Extension
49.0 Hz
51.1 Hz
High-Frequency Extension
17.2 kHz
19.9 kHz
Stereo Frequency Response With Preliminary Calibration
7.2
7.2
Frequency Response Calibrated
Suggested Preset
Music
No Preset
Suggested Bass Setting
0
0
Suggested Treble Setting
N/A
-3
Slope
-0.44
-0.09
Standard Error
3.26 dB
3.08 dB
Low-Frequency Extension
49.0 Hz
51.1 Hz
High-Frequency Extension
17.2 kHz
19.9 kHz
Stereo Soundstage
7.0
8.0
Crosstalk Error
2.45 dB
2.28 dB
Stereo Dynamics
7.5
8.1
Dynamic Range Compression
SPL @ Max Volume
95.6 dB SPL
91.6 dB SPL
DRC @ 90dB
0.28 dB
DRC @ Max Volume
2.66 dB
0.75 dB
Stereo Total Harmonic Distortion
6.3
Weighted THD @ 80dB
0.58
Weighted THD @ Max Volume
10.19
Center
5.8
7.8
Center Setup
Frequency Response
Localization
Phantom
Discrete
Slope
-1.44
-0.40
Std. Err.
5.48 dB
2.94 dB
SPL @ Max Volume
93.6 dB SPL
76.5 dB SPL
Weighted THD @ 80dB
0.55
0.32
Weighted THD @ Max Volume
3.22
1.56
Surround 5.1
3.3
5.7
Surround Setup
Frequency Response
Localization
Stereo (Downmix)
Phantom (Side Firing, Bar)
Slope
-1.47
0.01
Std. Err.
5.51 dB
3.27 dB
SPL @ Max Volume
91.2 dB SPL
75.1 dB SPL
Weighted THD @ 80dB
0.72
0.39
Weighted THD @ Max Volume
2.04
0.98
7.1 Rears
No
No
Height (Atmos)
0.0
6.1
Height Setup
H Frequency Response
Localization
Not Supported
Phantom (Up Firing, Bar)
Slope
N/A
0.55
Std. Err.
N/A
2.91 dB
SPL @ Max Volume
N/A
62.0 dB SPL
Weighted THD @ 80dB
N/A
1.07
Weighted THD @ Max Volume
N/A
0.18
Sound Enhancement Features
4.5
5.7
Room Correction
No
Yes
Dialogue Enhancement
Yes
Yes
Auto-Volume/Night Mode
Yes
Yes
Subwoofer Level Adjustment
No
No
Bass Adjustment
Yes
Yes
Treble Adjustment
No
Yes
EQ
Presets
No
Surround Level Adjustment
No
No
Rear Level Adjustment
No
No
Height Level Adjustment
No
Yes
Virtual Surround
No
No
Connectivity
Inputs/Outputs - Bar
Physical Connections Bar Photo 1
Physical Connections Bar Photo 2
Optical Audio In
1
Adapter into HDMI ARC
HDMI ARC
1
HDMI Out
No
eARC
HDMI 2.1 Class Bandwidth
No
Full HDMI In
No
No
Analog Audio In 3.5mm (Aux)
1
No
RCA In
No
No
USB for Files
No
No
Ethernet
No
1
Subwoofer Output
No
No
Audio Format Support: ARC/eARC
6.1
9.6
Dolby Atmos
No
Supported
Dolby Digital
Yes
Supported
Dolby Digital Plus
No
Supported
Dolby TrueHD
No
Supported
DTS
No
Supported
DTS:X
No
Not Supported
eARC
No
DTS-HD MA
No
Not Supported
PCM Channels
Up To 7.1
5.1 PCM (eARC only)
No
Audio Format Support: HDMI In
0.0
0.0
Dolby Atmos
No
Not Supported
Dolby Digital
No
Not Supported
Dolby Digital Plus
No
Not Supported
Dolby TrueHD
No
Not Supported
DTS
No
Not Supported
DTS:X
No
Not Supported
DTS-HD MA
No
Not Supported
PCM Channels
Not Supported
5.1 PCM
No
Audio Format Support: Optical
6.0
10
Dolby Digital
Yes
Supported
DTS
No
Supported
PCM Channels
2.0
Audio Latency: ARC
8.5
ARC Latency Video
PCM-2.0 ch
42 ms
PCM-5.1 ch
41 ms
Dolby MAT (PCM) Atmos
59 ms
Dolby Digital
92 ms
Dolby Digital Plus
101 ms
Dolby Digital Plus Atmos
101 ms
Audio Latency: HDMI In
7.3
0.0
HDMI Latency Video
Latency Video
PCM-2.0 ch
N/A
PCM-5.1 ch
N/A
Dolby MAT (PCM) Atmos
N/A
Dolby Digital
N/A
Dolby Digital Plus
N/A
Dolby Digital Plus Atmos
N/A
ARC
83 ms
Optical
75 ms
Full HDMI In
N/A
Audio Latency: Optical
9.0
Optical Latency Video
PCM-2.0 ch
99 ms
Dolby Digital
129 ms
Video Passthrough To TV
0.0
0.0
1080p Max Refresh Rate
Not Supported
1080p @ 4:4:4 Max Refresh Rate
Not Supported
4k Max Refresh Rate
Not Supported
4k @ 120Hz @ 10-Bit
Not Supported
4k @ 4:4:4 Max Refresh Rate
Not Supported
8k Max Refresh Rate
Not Supported
HDR10 Passthrough
No
No
HDR10+ Passthrough
No
Dolby Vision Passthrough
No
HDMI Forum VRR Passthrough
No
4k @ 60 Hz Passthrough
No
FreeSync Passthrough
No
G-SYNC Passthrough
No
ALLM Passthrough
No
4k @ 60 Hz @ 10 bit Passthrough
No
4k @ 60 Hz @ 4:4:4 Passthrough
No
Wireless Playback
6.0
3.0
Bluetooth
Yes
No
Wi-Fi Playback
No
Yes
Chromecast built-in
No
No
Apple AirPlay
No
Yes
Spotify Connect
No
Yes
Additional Features
Interface
Interface photo
Display
No
No
Bar Controls
Controls photo
Remote
Remote photo
Voice Assistants Support
Amazon Alexa
No
Yes (Built-in)
Google Assistant
No
Yes (Built-in)
Apple Siri
No
No
Microphone Mute
No
Yes
Check Price
Black
Signa S2
SEE PRICE
Amazon.comBlack
Arc
SEE PRICE
Amazon.comBlack
Signa S2D
SEE PRICE
Amazon.comShadow Edition
Arc SL
SEE PRICE
Amazon.comWhite
Arc
SEE PRICE
Amazon.com
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Polk Audio Signa S2
Sonos Arc
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Polk Audio Signa S2 vs Sonos Arc: Main Discussion
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