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Vizio M Series M51ax-J6 vs Vizio M Series M512a-H6
Side-by-Side Comparison
Products
Vizio M Series M51ax-J6
Vizio M Series M512a-H6
Tested using Methodology v1.3
Updated Sep 04, 2024 06:58 PM
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Updated Oct 24, 2024 02:30 PM
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Channels5.1
Channels5.1.2
Variants
- M Series M51ax-J6 (Dark Charcoal)
- M Series M512a-H6 (Black)
Our Verdict
Vizio M Series M51ax-J6
Vizio M Series M512a-H6
The Vizio M Series M51ax-J6 is slightly better than the Vizio M Series M512a-H6 if you watch a lot of 5.1 surround sound content or play audio loudly. However, the M512a-H6 is better for music, has a better soundstage, and is better built, with slightly greater passthrough capabilities. It even comes with two up-firing speakers.
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Dark Charcoal
M Series M51ax-J6
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M Series M512a-H6
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Amazon.comDark Charcoal
M Series M51ax-J6
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M Series M512a-H6
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M Series M51ax-J6
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M Series M512a-H6
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Walmart.comMain Differences forMixed Usage
Mixed Usage
Threshold
Mixed Usage
7.9
7.8
Surround 5.1
7.5
5.4
Stereo Soundstage
7.0
8.0
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
Partial, wired to wireless sub
Dimensions - Bar
Dimensions photo - bar
Width
36.0" (91.5 cm)
40.0" (101.7 cm)
Height
2.3" (5.8 cm)
2.7" (6.9 cm)
Depth
3.5" (9.0 cm)
4.1" (10.4 cm)
Dimensions - Subwoofer
Dimensions photo - sub
Width
8.3" (21.0 cm)
8.3" (21.2 cm)
Height
9.9" (25.2 cm)
9.9" (25.2 cm)
Depth
8.3" (21.0 cm)
11.7" (29.7 cm)
Dimensions - Satellites
Dimensions photo - satellites
Width
5.7" (14.6 cm)
5.7" (14.6 cm)
Height
2.3" (5.8 cm)
2.3" (5.8 cm)
Depth
3.5" (9.0 cm)
3.5" (9.0 cm)
Mounting
Bar Mounting Holes
Satellite Mounting Holes
Mountable Bar
Yes
Yes
Bar Brackets Included
Yes
Yes
Mountable Satellites
Yes
Yes
Satellite Brackets Included
Yes
Yes
Build Quality
7.0
7.5
Build quality photo
In The Box
In The Box photo
Sound
Stereo Frequency Response
7.9
7.8
Stereo Setup
Raw Frequency Response
Frequency Response Small
Channels
5.1
5.1.2
Tested Preset
Direct
Direct
Slope
-0.26
0.05
Standard Error
3.35 dB
3.79 dB
Low-Frequency Extension
33.6 Hz
31.7 Hz
High-Frequency Extension
19.9 kHz
19.9 kHz
Stereo Frequency Response With Preliminary Calibration
8.2
7.8
Frequency Response Calibrated
Suggested Preset
Direct
Direct
Suggested Bass Setting
-3
0
Suggested Treble Setting
0
0
Slope
-0.11
0.05
Standard Error
2.37 dB
3.79 dB
Low-Frequency Extension
33.2 Hz
31.7 Hz
High-Frequency Extension
19.6 kHz
19.9 kHz
Stereo Soundstage
7.0
8.0
Crosstalk Error
2.16 dB
2.28 dB
Stereo Dynamics
8.5
8.4
Dynamic Range Compression
SPL @ Max Volume
96.2 dB SPL
92.8 dB SPL
DRC @ 90dB
0.25 dB
0.24 dB
DRC @ Max Volume
1.40 dB
0.58 dB
Center
8.4
8.3
Center Setup
Frequency Response
Localization
Discrete
Discrete
Slope
-0.21
-0.05
Std. Err.
2.67 dB
2.96 dB
SPL @ Max Volume
92.4 dB SPL
93.1 dB SPL
Weighted THD @ 80dB
1.17
0.82
Weighted THD @ Max Volume
2.09
1.61
Surround 5.1
7.5
5.4
Surround Setup
Frequency Response
Localization
Discrete
Discrete
Slope
-0.17
-0.81
Std. Err.
4.01 dB
9.29 dB
SPL @ Max Volume
93.3 dB SPL
90.8 dB SPL
Weighted THD @ 80dB
0.34
1.03
Weighted THD @ Max Volume
1.02
14.09
7.1 Rears
No
No
Height (Atmos)
5.9
5.7
Height Setup
H Frequency Response
Localization
Phantom (Front Firing, Satellites)
Phantom (Up Firing, Bar)
Slope
-0.06
-0.31
Std. Err.
3.99 dB
4.49 dB
SPL @ Max Volume
85.1 dB SPL
78.9 dB SPL
Weighted THD @ 80dB
2.60
0.90
Weighted THD @ Max Volume
0.32
0.80
Sound Enhancement Features
7.1
7.4
Room Correction
No
No
Dialogue Enhancement
Yes
Yes
Auto-Volume/Night Mode
Yes
Yes
Subwoofer Level Adjustment
Yes
Yes
Bass Adjustment
Yes
Yes
Treble Adjustment
Yes
Yes
EQ
Presets
Presets
Surround Level Adjustment
Yes
Yes
Rear Level Adjustment
No
No
Height Level Adjustment
No
Yes
Virtual Surround
Yes
Yes
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
1
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
10
9.9
Dolby Atmos
Supported
Supported
Dolby Digital
Supported
Supported
Dolby Digital Plus
Supported
Supported
Dolby TrueHD
Supported
Supported
DTS
Supported
Supported
DTS:X
Supported
Supported
DTS-HD MA
Supported
Supported
PCM Channels
Up To 7.1
Up To 5.1
Audio Format Support: HDMI In
10
9.9
Dolby Atmos
Supported
Supported
Dolby Digital
Supported
Supported
Dolby Digital Plus
Supported
Supported
Dolby TrueHD
Supported
Supported
DTS
Supported
Supported
DTS:X
Supported
Supported
DTS-HD MA
Supported
Supported
PCM Channels
Up To 7.1
Up To 5.1
Audio Format Support: Optical
10
10
Dolby Digital
Supported
Supported
DTS
Supported
Supported
PCM Channels
2.0
2.0
Audio Latency: ARC
9.5
6.3
ARC Latency Video
PCM-2.0 ch
61 ms
92 ms
PCM-5.1 ch
106 ms
106 ms
Dolby MAT (PCM) Atmos
76 ms
112 ms
Dolby Digital
65 ms
124 ms
Dolby Digital Plus
70 ms
125 ms
Dolby Digital Plus Atmos
74 ms
134 ms
Audio Latency: HDMI In
6.9
7.1
HDMI Latency Video
PCM-2.0 ch
97 ms
97 ms
PCM-5.1 ch
87 ms
103 ms
Dolby MAT (PCM) Atmos
107 ms
93 ms
Dolby Digital
124 ms
123 ms
Dolby Digital Plus
115 ms
111 ms
Dolby Digital Plus Atmos
122 ms
120 ms
Audio Latency: Optical
7.0
6.1
Optical Latency Video
PCM-2.0 ch
147 ms
156 ms
Dolby Digital
207 ms
349 ms
Video Passthrough To TV
9.0
9.2
1080p Max Refresh Rate
120Hz
120Hz
1080p @ 4:4:4 Max Refresh Rate
120Hz
120Hz
4k Max Refresh Rate
120Hz
120Hz
4k @ 120Hz @ 10-Bit
Not Supported
Not Supported
4k @ 4:4:4 Max Refresh Rate
60Hz
60Hz
8k Max Refresh Rate
30Hz
30Hz
HDR10 Passthrough
Yes
Yes
HDR10+ Passthrough
Yes
Yes
Dolby Vision Passthrough
Yes
Yes
HDMI Forum VRR Passthrough
Yes
Yes
FreeSync Passthrough
No
Yes
G-SYNC Passthrough
No
No
ALLM Passthrough
Yes
Yes
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
Check Price
Dark Charcoal
M Series M51ax-J6
SEE PRICE
Amazon.comBlack
M Series M512a-H6
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Amazon.comDark Charcoal
M Series M51ax-J6
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BestBuy.comBlack
M Series M512a-H6
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BestBuy.comDark Charcoal
M Series M51ax-J6
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Walmart.comBlack
M Series M512a-H6
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Walmart.com
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Vizio M Series M51ax-J6 vs Vizio M Series M512a-H6: Main Discussion
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