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Vizio M Series M512a-H6 vs Polk Audio Signa S4
Side-by-Side Comparison
Products
Vizio M Series M512a-H6
Polk Audio Signa S4
Tested using Methodology v1.3
Updated Oct 24, 2024 02:30 PM
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Amazon.comTested using Methodology v1.3
Updated May 12, 2025 06:54 PM
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Amazon.com
Channels5.1.2
Channels3.1.2
Variants
- M Series M512a-H6 (Black)
- Signa S4 (Black)
- Signa S4D (Black)
Our Verdict
Vizio M Series M512a-H6
Polk Audio Signa S4
The Vizio M Series M512a-H6 is better than the Polk Audio Signa S4. The Vizio is a 5.1.2 setup with discrete satellites offering better soundstage and surround performances. It can reproduce a more extended low-bass than the Polk, too. Unlike the Polk, it has DTS support and a Full HDMI In port for video passthrough. If you don't have space for satellites in your room, the Polk is still a fair option with Dolby Atmos support.
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Black
M Series M512a-H6
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Amazon.comBlack
Signa S4
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Signa S4D
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Finding storeMain Differences forMixed Usage
Mixed Usage
Threshold
Mixed Usage
7.8
6.9
Stereo Frequency Response
7.8
7.3
Audio Format Support: HDMI In
9.9
0.0
Stereo Dynamics
8.4
7.0
Stereo Soundstage
8.0
7.0
Surround 5.1
5.4
3.4
Full Comparison
Design
Style - Bar
Style photo - bar
Style - Subwoofer
Style photo - sub
Sub Wireless
Yes
Yes
Enclosure
Ported
Ported
Style - Satellites
Style photo - satellites
Satellite Wireless
Partial, wired to wireless sub
No
Dimensions - Bar
Dimensions photo - bar
Width
40.0" (101.7 cm)
41.1" (104.5 cm)
Height
2.7" (6.9 cm)
2.4" (6.0 cm)
Depth
4.1" (10.4 cm)
3.7" (9.5 cm)
Dimensions - Subwoofer
Dimensions photo - sub
Width
8.3" (21.2 cm)
7.9" (20.0 cm)
Height
9.9" (25.2 cm)
12.9" (32.7 cm)
Depth
11.7" (29.7 cm)
11.0" (28.0 cm)
Dimensions - Satellites
Dimensions photo - satellites
Width
5.7" (14.6 cm)
N/A
Height
2.3" (5.8 cm)
N/A
Depth
3.5" (9.0 cm)
N/A
Mounting
Bar Mounting Holes
Satellite Mounting Holes
Mountable Bar
Yes
Yes
Bar Brackets Included
Yes
No
Mountable Satellites
Yes
No
Satellite Brackets Included
Yes
No
Build Quality
7.5
7.0
Build quality photo
In The Box
In The Box photo
Sound
Stereo Frequency Response
7.8
7.3
Stereo Setup
Raw Frequency Response
Frequency Response Small
Channels
5.1.2
3.1.2
Tested Preset
Direct
Music
Slope
0.05
-0.83
Standard Error
3.79 dB
3.32 dB
Low-Frequency Extension
31.7 Hz
47.6 Hz
High-Frequency Extension
19.9 kHz
16.7 kHz
Stereo Frequency Response With Preliminary Calibration
7.8
7.4
Frequency Response Calibrated
Suggested Preset
Direct
Music
Suggested Bass Setting
0
-3
Suggested Treble Setting
0
N/A
Slope
0.05
-0.15
Standard Error
3.79 dB
2.69 dB
Low-Frequency Extension
31.7 Hz
49.7 Hz
High-Frequency Extension
19.9 kHz
17.0 kHz
Stereo Soundstage
8.0
7.0
Crosstalk Error
2.28 dB
1.83 dB
Stereo Dynamics
8.4
7.0
Dynamic Range Compression
SPL @ Max Volume
92.8 dB SPL
87.5 dB SPL
DRC @ 90dB
0.24 dB
N/A
DRC @ Max Volume
0.58 dB
1.10 dB
Center
8.3
7.5
Center Setup
Frequency Response
Localization
Discrete
Discrete
Slope
-0.05
-0.92
Std. Err.
2.96 dB
4.35 dB
SPL @ Max Volume
93.1 dB SPL
84.0 dB SPL
Weighted THD @ 80dB
0.82
0.97
Weighted THD @ Max Volume
1.61
2.25
Surround 5.1
5.4
3.4
Surround Setup
Frequency Response
Localization
Discrete
Stereo (Downmix)
Slope
-0.81
-1.69
Std. Err.
9.29 dB
4.58 dB
SPL @ Max Volume
90.8 dB SPL
86.2 dB SPL
Weighted THD @ 80dB
1.03
0.95
Weighted THD @ Max Volume
14.09
2.59
7.1 Rears
No
No
Height (Atmos)
5.7
5.8
Height Setup
H Frequency Response
Localization
Phantom (Up Firing, Bar)
Phantom (Up Firing, Bar)
Slope
-0.31
-1.33
Std. Err.
4.49 dB
4.72 dB
SPL @ Max Volume
78.9 dB SPL
83.6 dB SPL
Weighted THD @ 80dB
0.90
0.70
Weighted THD @ Max Volume
0.80
0.95
Sound Enhancement Features
7.4
4.5
Room Correction
No
No
Dialogue Enhancement
Yes
Yes
Auto-Volume/Night Mode
Yes
Yes
Subwoofer Level Adjustment
Yes
No
Bass Adjustment
Yes
Yes
Treble Adjustment
Yes
No
EQ
Presets
Presets
Surround Level Adjustment
Yes
No
Rear Level Adjustment
No
No
Height Level Adjustment
Yes
No
Virtual Surround
Yes
No
Connectivity
Inputs/Outputs - Bar
Physical Connections Bar Photo 1
Physical Connections Bar Photo 2
Optical Audio In
1
1
HDMI Out
eARC
eARC
HDMI 2.1 Class Bandwidth
No
No
Full HDMI In
1
No
Analog Audio In 3.5mm (Aux)
1
1
RCA In
No
No
USB for Files
1
1
Ethernet
No
No
Subwoofer Output
No
No
Audio Format Support: ARC/eARC
9.9
8.1
Dolby Atmos
Supported
Supported
Dolby Digital
Supported
Supported
Dolby Digital Plus
Supported
Supported
Dolby TrueHD
Supported
Supported
DTS
Supported
Not Supported
DTS:X
Supported
Not Supported
DTS-HD MA
Supported
Not Supported
PCM Channels
Up To 5.1
Up To 7.1
Audio Format Support: HDMI In
9.9
0.0
Dolby Atmos
Supported
Not Supported
Dolby Digital
Supported
Not Supported
Dolby Digital Plus
Supported
Not Supported
Dolby TrueHD
Supported
Not Supported
DTS
Supported
Not Supported
DTS:X
Supported
Not Supported
DTS-HD MA
Supported
Not Supported
PCM Channels
Up To 5.1
Not Supported
Audio Format Support: Optical
10
6.5
Dolby Digital
Supported
Supported
DTS
Supported
Not Supported
PCM Channels
2.0
2.0
Audio Latency: ARC
6.3
8.1
ARC Latency Video
PCM-2.0 ch
92 ms
87 ms
PCM-5.1 ch
106 ms
88 ms
Dolby MAT (PCM) Atmos
112 ms
73 ms
Dolby Digital
124 ms
94 ms
Dolby Digital Plus
125 ms
97 ms
Dolby Digital Plus Atmos
134 ms
102 ms
Audio Latency: HDMI In
7.1
0.0
HDMI Latency Video
PCM-2.0 ch
97 ms
N/A
PCM-5.1 ch
103 ms
N/A
Dolby MAT (PCM) Atmos
93 ms
N/A
Dolby Digital
123 ms
N/A
Dolby Digital Plus
111 ms
N/A
Dolby Digital Plus Atmos
120 ms
N/A
Audio Latency: Optical
6.1
6.3
Optical Latency Video
PCM-2.0 ch
156 ms
140 ms
Dolby Digital
349 ms
386 ms
Video Passthrough To TV
9.2
0.0
1080p Max Refresh Rate
120Hz
Not Supported
1080p @ 4:4:4 Max Refresh Rate
120Hz
Not Supported
4k Max Refresh Rate
120Hz
Not Supported
4k @ 120Hz @ 10-Bit
Not Supported
Not Supported
4k @ 4:4:4 Max Refresh Rate
60Hz
Not Supported
8k Max Refresh Rate
30Hz
Not Supported
HDR10 Passthrough
Yes
No
HDR10+ Passthrough
Yes
No
Dolby Vision Passthrough
Yes
No
HDMI Forum VRR Passthrough
Yes
No
FreeSync Passthrough
Yes
No
G-SYNC Passthrough
No
No
ALLM Passthrough
Yes
No
Wireless Playback
6.0
6.0
Bluetooth
Yes
Yes
Wi-Fi Playback
No
No
Chromecast built-in
No
No
Apple AirPlay
No
No
Spotify Connect
No
No
Additional Features
Interface
Interface photo
Display
No
No
Bar Controls
Controls photo
Remote
Remote photo
Voice Assistants Support
Amazon Alexa
No
No
Google Assistant
No
No
Apple Siri
No
No
Microphone Mute
No
No
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Black
M Series M512a-H6
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Signa S4
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Signa S4D
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Vizio M Series M512a-H6
Polk Audio Signa S4
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Vizio M Series M512a-H6 vs Polk Audio Signa S4: Main Discussion
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