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LG SC9S vs LG S77S
Side-by-Side Comparison
Products
LG SC9S
LG S77S
Tested using Methodology v1.3
Updated Aug 29, 2024 06:10 PM
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Amazon.comTested using Methodology v1.2
Updated Nov 01, 2023 06:07 PM
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Channels3.1.3
Channels3.1.3
Variants
- SC9S (Black)
- S77S (Black)
Our Verdict
LG SC9S
LG S77S
The LG SC9S is a better 3.1.3 soundbar than the LG S77S. The SC9S is a better-built bar with a better stereo soundstage. It reproduces more low bass. It also has a room correction feature, which the S77S lacks, and it supports more wireless playback options.
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Black
SC9S
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Amazon.comBlack
S77S
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Amazon.comBlack
SC9S
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Amazon.comBlack
S77S
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Amazon.comBlack
SC9S
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Amazon.comBlack
S77S
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Amazon.comNotice: 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
7.8
7.3
Stereo Frequency Response
8.1
7.3
Stereo Soundstage
7.5
6.5
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
No
Dimensions - Bar
Dimensions photo - bar
Width
38.4" (97.6 cm)
35.0" (89.0 cm)
Height
2.4" (6.2 cm)
2.4" (6.2 cm)
Depth
4.9" (12.5 cm)
5.0" (12.7 cm)
Dimensions - Subwoofer
Dimensions photo - sub
Width
8.7" (22.0 cm)
7.6" (19.4 cm)
Height
15.4" (39.0 cm)
14.1" (35.7 cm)
Depth
12.3" (31.2 cm)
10.8" (27.5 cm)
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
Yes
Yes
Mountable Satellites
No
No
Satellite Brackets Included
No
No
Build Quality
8.0
7.5
Build quality photo
In The Box
In The Box photo
Sound
Stereo Frequency Response
8.1
7.3
Stereo Setup
Raw Frequency Response
Frequency Response Small
Channels
3.1.3
3.1.3
Tested Preset
Standard
Standard
Slope
0.08
0.38
Standard Error
2.77 dB
3.70 dB
Low-Frequency Extension
33.2 Hz
46.2 Hz
High-Frequency Extension
19.3 kHz
19.9 kHz
Stereo Frequency Response With Preliminary Calibration
8.1
7.5
Frequency Response Calibrated
Suggested Preset
Standard
Standard
Suggested Bass Setting
0
1
Suggested Treble Setting
0
0
Slope
0.08
0.02
Standard Error
2.77 dB
3.03 dB
Low-Frequency Extension
33.2 Hz
45.6 Hz
High-Frequency Extension
19.3 kHz
19.3 kHz
Stereo Soundstage
7.5
6.5
Crosstalk Error
3.26 dB
2.85 dB
Stereo Dynamics
8.1
7.7
Dynamic Range Compression
SPL @ Max Volume
92.0 dB SPL
94.6 dB SPL
DRC @ 90dB
0.35 dB
DRC @ Max Volume
0.93 dB
2.19 dB
Stereo Total Harmonic Distortion
7.5
Weighted THD @ 80dB
0.44
Weighted THD @ Max Volume
2.86
Center
6.9
7.5
Center Setup
Frequency Response
Localization
Discrete
Discrete
Slope
1.71
2.27
Std. Err.
5.24 dB
5.14 dB
SPL @ Max Volume
67.5 dB SPL
92.9 dB SPL
Weighted THD @ 80dB
0.71
1.07
Weighted THD @ Max Volume
3.46
4.09
Surround 5.1
3.7
4.2
Surround Setup
Frequency Response
Localization
Stereo (Downmix)
Stereo (Downmix)
Slope
0.15
0.55
Std. Err.
2.77 dB
3.53 dB
SPL @ Max Volume
71.4 dB SPL
96.2 dB SPL
Weighted THD @ 80dB
0.48
0.48
Weighted THD @ Max Volume
2.65
2.92
7.1 Rears
No
No
Height (Atmos)
3.8
5.6
Height Setup
H Frequency Response
Localization
Phantom (Up Firing, Bar)
Phantom (Up Firing, Bar)
Slope
2.70
-0.23
Std. Err.
9.03 dB
4.41 dB
SPL @ Max Volume
53.5 dB SPL
75.6 dB SPL
Weighted THD @ 80dB
4.20
3.46
Weighted THD @ Max Volume
0.67
0.32
Sound Enhancement Features
8.9
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
No
Rear Level Adjustment
No
No
Height Level Adjustment
Yes
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)
No
No
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
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 7.1
Audio Format Support: HDMI In
10
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 7.1
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
8.3
ARC Latency Video
PCM-2.0 ch
63 ms
PCM-5.1 ch
66 ms
Dolby MAT (PCM) Atmos
65 ms
Dolby Digital
98 ms
Dolby Digital Plus
87 ms
Dolby Digital Plus Atmos
93 ms
Audio Latency: HDMI In
8.9
8.6
HDMI Latency Video
Latency Video
PCM-2.0 ch
64 ms
PCM-5.1 ch
65 ms
Dolby MAT (PCM) Atmos
68 ms
Dolby Digital
102 ms
Dolby Digital Plus
92 ms
Dolby Digital Plus Atmos
98 ms
ARC
56 ms
Optical
51 ms
Full HDMI In
19 ms
Audio Latency: Optical
7.7
Optical Latency Video
PCM-2.0 ch
122 ms
Dolby Digital
179 ms
Video Passthrough To TV
8.4
9.0
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
Not Supported
30Hz
HDR10 Passthrough
Yes
Yes
HDR10+ Passthrough
No
Yes
Dolby Vision Passthrough
Yes
Yes
HDMI Forum VRR Passthrough
Yes
Yes
FreeSync Passthrough
No
No
G-SYNC Passthrough
No
No
ALLM Passthrough
Yes
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
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
SC9S
SEE PRICE
Amazon.comBlack
S77S
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Amazon.comBlack
SC9S
SEE PRICE
Amazon.comBlack
S77S
SEE PRICE
Amazon.comBlack
SC9S
SEE PRICE
Amazon.comBlack
S77S
SEE PRICE
Amazon.com
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LG SC9S
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