LG 75-SM8670PUA TV Review

7.28 Mixed Usages
7.5 TV Shows:
6 HDR Movies:
7.2 HDR Gaming:
7.6 Sports( Considering Day Light)
8.1 PC Monitor ():
Release year: 2019 Rating: 4.6
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Screen Size Variation Under 55 Inches , 55-65 Inches , 65-77 Inches inch
Features: Smart TV , HDR , High Definition , CEC Enabled , With Energy Saving Mode
Display Type: LED
Screen Design Flat Tv
Connectivity: WiFi , HDMI , USB , Ethernet , Bluetooth , Optical Audio , RF
Number Of HDMI Ports: 4
HDR HDR10 , Dolby Vision , HLG
Refresh Rate: 120 Hz
Next Gen. Gaming Feature: VRR (Variable Refresh Rate) , ALLM (Auto Low Latency Mode) , eARC
TV Type Indoor
Special Feature: Flat
Supported Internet Services: Netflix, Disney Plus, Prime Video, Hulu, HBO Max, Airplay 2, Peacock, Apple TV


Screen Size: 75 inches
Display Type LED
Aspect Ratio 16:9
Screen Resolution (pixels): 3840 x 2160 (4K UHD)
Screen Refresh Rate: 120Hz
Viewing Angle 178 degree
Backlight Type: Full Array
Quantum Dot Color: No
Video Processing Technology: α7 Gen 2 Intelligent Processor
HDR (High Dynamic Range): Dolby Vision, HDR10, HLG


Contrast: Native Contrast 1,176 : 1, Contrast with local dimming 1,182 : 1
Brightness: Peak 432 cd/m²
Local Dimming: Yes
Gray & Black Uniformity: 50% Std. Dev. 4.707%, 50% DSE 0.167% & Black Native Std. Dev. 2.050%, Std. Dev. w/ L.D. 4.766%
Viewing Angle: 178 degree
Reflections: Screen Finish Semi-gloss, Total Reflections 3.0%, Indirect Reflections 0.5%
Calibration: Pre White Balance dE 5.12 Color dE 3.47 Gamma 2.11 Color Temperature 5,905 K
Pixels & Motion: TruMotion 240 (Native 120Hz) & Type LED, Sub-Type IPS
Input Handling (480p and 720p): The LG 55SM8600PUA upscales 480p content, like DVDs, well without any obvious upscaling artifacts. & 720p content, like cable TV, is upscaled well, with no strange artifacts.
Input Handling (1080p): Blu-rays and 1080p content look almost as good as native 4k content.
Input Handling (4k): Native 4k content displays perfectly.
Color Gamut: Wide Color Gamut Yes, DCI P3 xy 85.69%, DCI P3 uv 91.67% & Rec 2020 xy 63.26%, Rec 2020 uv 70.41%
Color Volume: : Normalized DCI P3 Coverage ITP 77.2% 10,000 cd/m², DCI P3 Coverage ITP 35.0%
Gradient & Response Time: Color Depth 10 Bit, Red (Std. Dev.) 0.087, Green (Std. Dev.) 0.096 & Response time 12.4 ms
Supported Resolutions: 480p, 780p, 1080p, 4K
Interface: webOS


Numbers of HDMI: 4
HDMI Version 2.1
Audio Return Channel 1
Optical Digital Audio Output: 1
Component Video Inputs: 0
Composite Video Inputs: 0
3.5mm Composite A/V Inputs: 0
RF Inputs: 1
USB Ports: 3
Analog Audio/Headphone Output: 1


HDR10: Yes
HDR10+ : N/A
Dolby Vision: Yes
HLG : Yes
HDMI 2.0 : Yes (HDMI 1,2,3,4)
HDMI 2.1 : No
CEC Enabled:
HDCP 2.2: Yes (HDMI 1,2,3,4)
ATSC Tuner: 1.0
USB 3.0 : N/A
Variable Analog Audio Out: N/A
Wi-Fi : Yes (802.11ac)


eARC: Dolby Atmos Over Dolby Digital Plus : Yes
eARC: Dolby Digital Plus 7.1 : Yes
eARC: LPCM 7.1 Over Dolby MAT: N/A
eARC: Dolby TrueHD 7.1 : N/A
eARC: DTS:X Over DTS-HD Master Audio: Yes
eARC: DTS-HD Master Audio 7.1: Yes
eARC: LPCM Channels (Bitstream) : 2.0
ARC: Dolby Digital 5.1 Yes
ARC: DTS 5.1 Yes
Optical: Dolby Digital 5.1: Yes
Optical: DTS 5.1 : Yes


Built-in Speakers: Down-firing speakers
Voice Clarity: May struggle with clarity at high volumes or complex dialogue scenes.
Distortion: Weighted THD @ 80 0.184, Weighted THD @ Max 0.955, IMD @ 80 8.52%
Frequency Response: Low-Frequency Extension 151.02 Hz
Bass: Average
Soundstage: Limited stereo separation due to speaker placement.
Immersion: Not ideal for surround sound experiences.
Dolby Atmos Support: Yes Support
Audio Passthrough: Likely (ARC) Allows sending audio formats to a compatible soundbar or receiver through HDMI.
Recommendation: recommended Built-in speakers are suitable for casual viewing but lack power and fullness for an immersive experience. A soundbar is highly recommended


Cast Capable Yes
USB Drive Playback Yes
USB Drive HDR Playback Yes
HDR in Netflix Yes
HDR in YouTube Yes
Apps Navigation Ease To Use


Operating System webOS
CPU / Processor α7 Gen 2 Intelligent Processor
Graphic Processor / GPU N/A
Storage 4 GB
Chromecast Not Supported
Alexa Built-in


PS5 Compatibility: Yes
Xbox Series X |S Compatibility Yes
Auto Low Latency Mode (ALLM): Yes
Variable Refresh Rate (VRR): Yes
Input Lag: 14.0 ms
HDR: Yes
High Frame Rate (HFR): Up to 120 Hz
Additional Features: Game Mode, Auto Low Latency Mode (ALLM), Variable Refresh Rate (VRR)


Voice Control Yes
Universal Remote Support for HDMI Device Yes
Universal Remote Support for non-HDMI Device Yes
Remote App LG TV Plus


Dimensions 66.3 W x 41.1 H x 14.6 D inch with Stand
Style The LG SM8600 has an excellent design. The stand is made of plastic and supports the TV well. However, the TV wobbles significantly if you nudge it.
Back & Borders: Wall Mount VESA 300x300 & Borders 0.45 inch
Thickness: Max Thickness 2.50 inch
Build Quality: TV feels solid, and the border finish gives it a more premium feel. You shouldn't have any issues with it.
Longevity: N/A
Stand: its neck has a lot of flex and the TV wobbles significantly if nudged
Included Components: Remote Control, Power Cable, E-Manual, Remote Control Batteries, Quick Start Guide


TV Shows: 7.5
HDR Movies: 6
HDR Gaming: 7.2
Sports( Considering Day Light) 7.6
PC Monitor (): 8.1
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Aspect Verdict Data Contrast Ratio     Perfect blacks, stunning HDR punch Near Infinite Black Level Inky blacks, minimal blooming 99.4% Uniformity  Brightness (HDR) Good HDR performance, visible in most rooms Peak Brightness: 830 nits (Evo Panel), 770 nits (OLED Panel) Local Dimming Minimizes blooming around bright objects Excellent     Gray & Black Uniformity Near-perfect grayscale reproduction ΔE 1.4 (Avg.) Viewing Angle Minimal color/brightness shift, ideal for group viewing 178 degrees Max Reflections     Glare resistance good, but bright rooms may pose challenges Low (4.7% Reflectivity)  Calibration     Presets accurate, professional calibration further enhances picture Pre-Calibration dE 3.7, Post-Calibration dE 0.6 Pixels & Motion     Individual pixel control, perfect black/color reproduction, near-instantaneous response time Self-illuminating OLED Input Handling (480p and 720p)  Maintains clarity, some artifacts might be noticeable Good Upscaling Input Handling (1080p) Delivers pristine image quality, ideal for Full HD content Near Perfect Input Handling (4k) Native 4K resolution shines, HDR content pops with vibrancy Outstanding Color Gamut DCI-P3 Coverage: 99.8%, Rec. 2020 Coverage: 83.2% Wide Color Volume P3 Color Volume: 99.2%, Rec. 2020 Color Volume: 71.5% High Gradient & Response Time Gradient Error: 0.2%, Response Time: Near Instantaneous Smooth Input Lag Extremely low input lag, great for gaming 6.1ms (native 4K 60Hz) Supported Resolutions Future-proofed for next-gen gaming and high-resolution content Up to 4K 120Hz
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