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Vizio M Series M51a-H6 vs Vizio M Series M51ax-J6
Side-by-Side Comparison
Products
Vizio M Series M51a-H6
Vizio M Series M51ax-J6
Tested using Methodology v1.3
Updated Sep 04, 2024 08:43 PM
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BestBuy.comTested using Methodology v1.3
Updated Sep 04, 2024 06:58 PM
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Channels5.1
Channels5.1
Variants
- M Series M51a-H6 (Black)
- M Series M51ax-J6 (Dark Charcoal)
Our Verdict
Vizio M Series M51a-H6
Vizio M Series M51ax-J6
The Vizio M Series M51a-H6 is a better soundbar for mixed usage than the Vizio M Series M51ax-J6. The M51a-H6 offers a better latency performance over its ARC port, though HDMI In has higher latency. It also reproduces a more extended low bass to help you feel thump and rumble.
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Black
M Series M51a-H6
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M Series M51ax-J6
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M Series M51a-H6
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Amazon.comDark Charcoal
M Series M51ax-J6
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M Series M51a-H6
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Amazon.comDark Charcoal
M Series M51ax-J6
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M Series M51a-H6
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M Series M51ax-J6
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BestBuy.comBlack
M Series M51a-H6
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M Series M51a-H6
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Amazon.comBlack
M Series M51a-H6
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Amazon.comBlack
M Series M51a-H6
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Amazon.comMain Differences for
Threshold
Mixed Usage
8.0
7.9
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)
36.0" (91.5 cm)
Height
2.3" (5.8 cm)
2.3" (5.8 cm)
Depth
3.5" (9.0 cm)
3.5" (9.0 cm)
Dimensions - Subwoofer
Dimensions photo - sub
Width
8.3" (21.2 cm)
8.3" (21.0 cm)
Height
9.9" (25.2 cm)
9.9" (25.2 cm)
Depth
11.7" (29.7 cm)
8.3" (21.0 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
7.0
Build quality photo
In The Box
In The Box photo
Sound
Stereo Frequency Response
8.0
7.9
Stereo Setup
Raw Frequency Response
Frequency Response Small
Channels
5.1
5.1
Tested Preset
Direct
Direct
Slope
-0.46
-0.26
Standard Error
3.35 dB
3.35 dB
Low-Frequency Extension
31.3 Hz
33.6 Hz
High-Frequency Extension
19.9 kHz
19.9 kHz
Stereo Frequency Response With Preliminary Calibration
8.0
8.2
Frequency Response Calibrated
Suggested Preset
Direct
Direct
Suggested Bass Setting
-5
-3
Suggested Treble Setting
1
0
Slope
-0.20
-0.11
Standard Error
3.29 dB
2.37 dB
Low-Frequency Extension
30.8 Hz
33.2 Hz
High-Frequency Extension
19.9 kHz
19.6 kHz
Stereo Soundstage
7.0
7.0
Crosstalk Error
2.47 dB
2.16 dB
Stereo Dynamics
8.4
8.5
Dynamic Range Compression
SPL @ Max Volume
96.0 dB SPL
96.2 dB SPL
DRC @ 90dB
0.23 dB
0.25 dB
DRC @ Max Volume
1.94 dB
1.40 dB
Center
8.4
8.4
Center Setup
Frequency Response
Localization
Discrete
Discrete
Slope
-0.17
-0.21
Std. Err.
2.85 dB
2.67 dB
SPL @ Max Volume
93.5 dB SPL
92.4 dB SPL
Weighted THD @ 80dB
0.74
1.17
Weighted THD @ Max Volume
1.68
2.09
Surround 5.1
7.5
7.5
Surround Setup
Frequency Response
Localization
Discrete
Discrete
Slope
-0.10
-0.17
Std. Err.
4.15 dB
4.01 dB
SPL @ Max Volume
94.7 dB SPL
93.3 dB SPL
Weighted THD @ 80dB
0.32
0.34
Weighted THD @ Max Volume
1.06
1.02
7.1 Rears
No
No
Height (Atmos)
5.9
5.9
Height Setup
H Frequency Response
Localization
Phantom (Front Firing, Satellites)
Phantom (Front Firing, Satellites)
Slope
-0.03
-0.06
Std. Err.
4.06 dB
3.99 dB
SPL @ Max Volume
86.9 dB SPL
85.1 dB SPL
Weighted THD @ 80dB
2.29
2.60
Weighted THD @ Max Volume
0.33
0.32
Sound Enhancement Features
7.1
7.1
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
No
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
9.9
10
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 5.1
Up To 7.1
Audio Format Support: HDMI In
9.9
10
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 5.1
Up To 7.1
Audio Format Support: Optical
10
10
Dolby Digital
Supported
Supported
DTS
Supported
Supported
PCM Channels
2.0
2.0
Audio Latency: ARC
7.3
9.5
ARC Latency Video
PCM-2.0 ch
98 ms
61 ms
PCM-5.1 ch
105 ms
106 ms
Dolby MAT (PCM) Atmos
103 ms
76 ms
Dolby Digital
99 ms
65 ms
Dolby Digital Plus
105 ms
70 ms
Dolby Digital Plus Atmos
121 ms
74 ms
Audio Latency: HDMI In
9.0
6.9
HDMI Latency Video
PCM-2.0 ch
105 ms
97 ms
PCM-5.1 ch
82 ms
87 ms
Dolby MAT (PCM) Atmos
95 ms
107 ms
Dolby Digital
93 ms
124 ms
Dolby Digital Plus
82 ms
115 ms
Dolby Digital Plus Atmos
90 ms
122 ms
Audio Latency: Optical
5.6
7.0
Optical Latency Video
PCM-2.0 ch
240 ms
147 ms
Dolby Digital
156 ms
207 ms
Video Passthrough To TV
8.7
9.0
1080p Max Refresh Rate
120Hz
120Hz
1080p @ 4:4:4 Max Refresh Rate
120Hz
120Hz
4k Max Refresh Rate
60Hz
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
Yes
No
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
Black
M Series M51a-H6
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BestBuy.comDark Charcoal
M Series M51ax-J6
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Amazon.comBlack
M Series M51a-H6
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Amazon.comDark Charcoal
M Series M51ax-J6
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Walmart.comBlack
M Series M51a-H6
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Amazon.comDark Charcoal
M Series M51ax-J6
SEARCH
B&HBlack
M Series M51a-H6
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Amazon.comDark Charcoal
M Series M51ax-J6
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BestBuy.comBlack
M Series M51a-H6
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Amazon.comBlack
M Series M51a-H6
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Amazon.comBlack
M Series M51a-H6
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Amazon.comBlack
M Series M51a-H6
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Vizio M Series M51a-H6 vs Vizio M Series M51ax-J6: Main Discussion
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