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LG SP9YA vs Vizio M Series M51ax-J6
Side-by-Side Comparison
Products
LG SP9YA
Vizio M Series M51ax-J6
Tested using Methodology v1.1
Updated Jan 12, 2024 07:43 PM
SEE PRICE
Amazon.comTested using Methodology v1.3
Updated Sep 04, 2024 06:58 PM
SEE PRICE
Amazon.com
Channels5.1.2
Channels5.1
Variants
- SP9YA (Black)
- M Series M51ax-J6 (Dark Charcoal)
Our Verdict
LG SP9YA
Vizio M Series M51ax-J6
Depending on your listening habits, you may prefer either the LG SP9YA or the Vizio M Series M51ax-J6. The LG is a 5.1.2 setup with a better soundstage and more sound enhancement features, including room correction. The Vizio has a better surround performance thanks to the included satellites. While you can purchase satellites for the LG separately, the Vizio offers a better value overall.
Notice: Two or more of the products selected have been tested with different test methodologies, so some of the results below aren't directly comparable. Learn how our test benches and scoring system work, and read more about the latest changes to our soundbars test methodology.
Main Differences for
Threshold
Mixed Usage
8.0
7.9
Stereo Frequency Response
8.3
7.9
Surround 5.1
4.8
7.5
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
No
Partial, wired to wireless sub
Dimensions - Bar
Dimensions photo - bar
Width
48.1" (122.2 cm)
36.0" (91.5 cm)
Height
2.3" (5.8 cm)
2.3" (5.8 cm)
Depth
5.8" (14.7 cm)
3.5" (9.0 cm)
Dimensions - Subwoofer
Dimensions photo - sub
Width
8.7" (22.1 cm)
8.3" (21.0 cm)
Height
15.4" (39.0 cm)
9.9" (25.2 cm)
Depth
12.3" (31.2 cm)
8.3" (21.0 cm)
Dimensions - Satellites
Dimensions photo - satellites
Width
N/A
5.7" (14.6 cm)
Height
N/A
2.3" (5.8 cm)
Depth
N/A
3.5" (9.0 cm)
Mounting
Bar Mounting Holes
Satellite Mounting Holes
Mountable Bar
Yes
Yes
Bar Brackets Included
Yes
Yes
Mountable Satellites
No
Yes
Satellite Brackets Included
No
Yes
Build Quality
8.0
7.0
Build quality photo
In The Box
In The Box photo
Sound
Stereo Frequency Response
8.3
7.9
Stereo Setup
Raw Frequency Response
Frequency Response Small
Channels
5.1.2
5.1
Tested Preset
Standard
Direct
Slope
-0.26
-0.26
Standard Error
2.22 dB
3.35 dB
Low-Frequency Extension
33.2 Hz
33.6 Hz
High-Frequency Extension
19.9 kHz
19.9 kHz
Stereo Frequency Response With Preliminary Calibration
8.3
8.2
Frequency Response Calibrated
Suggested Preset
Standard
Direct
Suggested Bass Setting
-1
-3
Suggested Treble Setting
1
0
Slope
-0.06
-0.11
Standard Error
2.18 dB
2.37 dB
Low-Frequency Extension
33.2 Hz
33.2 Hz
High-Frequency Extension
19.9 kHz
19.6 kHz
Stereo Soundstage
7.5
7.0
Crosstalk Error
2.14 dB
2.16 dB
Stereo Dynamics
8.0
8.5
Dynamic Range Compression
SPL @ Max Volume
91.8 dB SPL
96.2 dB SPL
DRC @ 90dB
0.25 dB
DRC @ Max Volume
0.92 dB
1.40 dB
Stereo Total Harmonic Distortion
7.0
Weighted THD @ 80dB
0.65
Weighted THD @ Max Volume
3.19
Center
7.7
8.4
Center Setup
Frequency Response
Localization
Discrete
Discrete
Slope
-1.47
-0.21
Std. Err.
3.95 dB
2.67 dB
SPL @ Max Volume
86.8 dB SPL
92.4 dB SPL
Weighted THD @ 80dB
1.10
1.17
Weighted THD @ Max Volume
7.83
2.09
Surround 5.1
4.8
7.5
Surround Setup
Frequency Response
Localization
Phantom (Side Firing, Bar)
Discrete
Slope
1.67
-0.17
Std. Err.
7.19 dB
4.01 dB
SPL @ Max Volume
92.5 dB SPL
93.3 dB SPL
Weighted THD @ 80dB
0.85
0.34
Weighted THD @ Max Volume
7.18
1.02
7.1 Rears
No
No
Height (Atmos)
5.3
5.9
Height Setup
H Frequency Response
Localization
Phantom (Up Firing, Bar)
Phantom (Front Firing, Satellites)
Slope
-0.12
-0.06
Std. Err.
5.73 dB
3.99 dB
SPL @ Max Volume
79.4 dB SPL
85.1 dB SPL
Weighted THD @ 80dB
2.00
2.60
Weighted THD @ Max Volume
0.29
0.32
Sound Enhancement Features
9.2
7.1
Room Correction
Yes
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
Yes
No
Height Level Adjustment
Yes
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 ARC
1 (shared)
HDMI Out
1 (shared)
eARC
HDMI 2.1 Class Bandwidth
No
Full HDMI In
1
1
Analog Audio In 3.5mm (Aux)
No
1
RCA In
No
No
USB for Files
1
1
Ethernet
No
No
Subwoofer Output
No
No
Audio Format Support: ARC/eARC
10
10
Dolby Atmos
Yes
Supported
Dolby Digital
Yes
Supported
Dolby Digital Plus
Yes
Supported
Dolby TrueHD
Yes
Supported
DTS
Yes
Supported
DTS:X
Yes
Supported
eARC
Yes
DTS-HD MA
Yes
Supported
PCM Channels
Up To 7.1
5.1 PCM (eARC only)
Yes
Audio Format Support: HDMI In
10
10
Dolby Atmos
Yes
Supported
Dolby Digital
Yes
Supported
Dolby Digital Plus
Yes
Supported
Dolby TrueHD
Yes
Supported
DTS
Yes
Supported
DTS:X
Yes
Supported
DTS-HD MA
Yes
Supported
PCM Channels
Up To 7.1
5.1 PCM
Yes
Audio Format Support: Optical
10
10
Dolby Digital
Yes
Supported
DTS
Yes
Supported
PCM Channels
2.0
Audio Latency: ARC
9.5
ARC Latency Video
PCM-2.0 ch
61 ms
PCM-5.1 ch
106 ms
Dolby MAT (PCM) Atmos
76 ms
Dolby Digital
65 ms
Dolby Digital Plus
70 ms
Dolby Digital Plus Atmos
74 ms
Audio Latency: HDMI In
7.5
6.9
HDMI Latency Video
Latency Video
PCM-2.0 ch
97 ms
PCM-5.1 ch
87 ms
Dolby MAT (PCM) Atmos
107 ms
Dolby Digital
124 ms
Dolby Digital Plus
115 ms
Dolby Digital Plus Atmos
122 ms
ARC
82 ms
Optical
66 ms
Full HDMI In
75 ms
Audio Latency: Optical
7.0
Optical Latency Video
PCM-2.0 ch
147 ms
Dolby Digital
207 ms
Video Passthrough To TV
0.0
9.0
1080p Max Refresh Rate
120Hz
1080p @ 4:4:4 Max Refresh Rate
120Hz
4k Max Refresh Rate
120Hz
4k @ 120Hz @ 10-Bit
Not Supported
4k @ 4:4:4 Max Refresh Rate
60Hz
8k Max Refresh Rate
30Hz
HDR10 Passthrough
Yes
Yes
HDR10+ Passthrough
Yes
Dolby Vision Passthrough
Yes
HDMI Forum VRR Passthrough
Yes
4k @ 60 Hz Passthrough
Yes
FreeSync Passthrough
No
G-SYNC Passthrough
No
ALLM Passthrough
Yes
4k @ 60 Hz @ 10 bit Passthrough
Yes
4k @ 60 Hz @ 4:4:4 Passthrough
Yes
Wireless Playback
10
6.0
Bluetooth
Yes
Yes
Wi-Fi Playback
Yes
No
Chromecast built-in
Yes
No
Apple AirPlay
Yes
No
Spotify Connect
Yes
No
Additional Features
Interface
Interface photo
Display
Yes
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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LG SP9YA
Vizio M Series M51ax-J6
Comments
LG SP9YA vs Vizio M Series M51ax-J6: Main Discussion
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