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  1. Table of Contents
  2. Intro
  3. Design
    1. Stand
    2. Back
    3. Borders
    4. Thickness
    5. Temperature
    6. Build Quality
  4. Picture Quality
    1. Contrast
    2. Local Dimming
    3. SDR Peak Brightness
    4. HDR Peak Brightness
    5. Gray Uniformity
    6. Viewing Angle
    7. Black Uniformity
    8. Reflections
    9. Pre Calibration
    10. Post Calibration
    11. 480p Input
    12. 720p Input
    13. 1080p Input
    14. 4k Input
    15. Color Gamut
    16. Color Volume
    17. Gradient
    18. Temporary Image Retention
    19. Permanent Burn-In Risk
    20. Pixels
  5. Motion
    1. Response Time
    2. Flicker-Free
    3. Black Frame Insertion (BFI)
    4. Motion Interpolation
    5. Stutter
    6. 24p Judder
    7. Variable Refresh Rate
  6. Inputs
    1. Input Lag
    2. Supported Resolutions
    3. Side Inputs
    4. Rear Inputs
    5. Total Inputs
    6. Inputs Specifications
  7. Sound Quality
    1. Frequency Response
    2. Distortion
  8. Smart Features
    1. Interface
    2. Ad-Free
    3. Apps and Features
    4. Remote
    5. Remote App
    6. TV Controls
    7. In The Box
    8. Misc
  9. Sizes and Variants
  10. Compared
  11. Conclusion
  12. Q&A
Reviewed on Apr 20, 2018 , Eric Bousquet, Ian Cumming, Adam Babcock, Yannick Khong

LG SK9000
TV REVIEW

Usage Ratings - Version 1.2
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Test Benches: test

  • 1.2: Winter 2018
  • 1.1: Summer 2017
  • 1.0: Winter 2015
  • 0.9: Winter 2014
  • 0.8: Winter 2013
7.9
Mixed Usage
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What it is General purpose. The TV will be used for a variety of content and usages. Movies at night, TV shows during the day, video games from time to time, etc.
Score components:
Recommended if under (USD)
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What it is: Maximum price to be a better value than its competitors.
How to use it: This product is the best choice in its range if you can find it below this price.
Automatically calculated every hour based on the scores and prices of all other products we've tested.
: $640
Value for price beaten by
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What it is: Product with the best value in this price range
Other best choice in a cheaper price range
Other best choice in a pricier price range
Automatically updated every hour based on the scores and prices of all other products we've tested.
: Sony X900F
7.2
Movies
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What it is Movies in the dark. The TV will be used for watching movies in a controlled environment, directly in front, in a home theater way. Mostly only high quality content, like Blu-rays, UHD Blu-rays, streaming and a little bit of HDR.
Score components:
8.2
TV Shows
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What it is TV Shows in a bright living room. The TV will be used in to watch TV shows, in a bright room during the day, from multiple viewing positions at different angles. The content watched has an average quality: cable, streaming, SD channels, etc.
Score components:
8.0
Sports
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What it is Sports in a living room. The TV will be used to watch sports during the day, like football or hockey. Usually watched with a group, so from multiple viewing position.
8.5
Video Games
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What it is Video games. The TV will be used to play video games, directly in front, in a controlled light environment. Usually fast games, like online FPS, where motion blur and input lag is important.
7.2
HDR Movies
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What it is HDR Movies and TV shows. The TV will be used to watch 4k UHD HDR content, with a wide color gamut and a high peak brightness. Either via UHD Blu-rays or HDR streaming.
7.9
HDR Gaming
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What it is HDR Gaming. The TV will be used to play HDR video games using consoles that support it or on current generation gaming PCs. Xbox One S, PS4 Pro, GTX 10 series and AMD RX series graphics cards.
8.4
PC Monitor
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What it is PC Monitor. The TV will be used as a PC monitor, from 2-3 feet away, either for productivity purposes or gaming. Sharp text is important, as well as a high resolution.
Score components:
Type : LED
Sub-Type
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What it is: Type of display technology used by the TV.
When it matters: Different technologies have different performance and are suited to different uses
Good value: IPS maintains good color accuracy at an angle, but has a poor contrast ratio from in front. VA has great picture quality in front, but loses saturation at an angle. OLED maintains good color accuracy at an angle without any of the other issues seen with IPS and VA, as they keep good brightness and contrast at an angle.
:
IPS
Resolution : 4k

The Super UHD LG SK9000 is a 4k TV with very good performance for a range of usages. The picture quality is good in a bright room, and the TV can get bright to overcome glare. It also has great reflection handling, and the image remains accurate when viewed at an angle. Unfortunately, the dark-room performance is sub-par as the native contrast ratio is low and blacks appear gray, despite the full-array local dimming.

Test Results
Design 9.5
Picture Quality 7.6
Motion 7.6
Inputs 9.3
Sound Quality 6.8
Smart Features 8.4
Pros
  • Image remains accurate when viewed at an angle
  • Feels very responsive for gaming
  • Can produce bright highlights
Cons
  • Blacks appear gray in a dark room

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55" 55SK9000PUA
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65" 65SK9000PUA
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9.5

Design

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Score components: Subjectively assigned
LG SK9000 Design Picture
Curved : No

The design of the LG SK9000 is very similar to last year's SJ8500. It has the same familiar curved stand, although it is a bit thinner this year and there is a bit more flex to the stand. The color of the frame is more uniform, with a black back instead of the white back of last year's model. There are some practical limitations as there is only very basic cable management and the stand does not allow you to place a soundbar directly in front of the TV.

Stand
LG SK9000 Stand Picture

The stand is curved and looks very similar to last year's SJ9500. It has a slightly darker metal finish and is slightly narrower. The stand does wobble a bit if the floor shakes.

Footprint of the 55" TV Stand: 9.8" x 32.5"

Back
LG SK9000 Back Picture
Wall Mount : Vesa 300x300

The rear of the LG 55SK9000 is very similar to the SJ8500, except all black. There is only basic cable management as seen here.

Borders
LG SK9000 Borders Picture
Borders : 0.43" (1.1 cm)

The borders of the TV are thin, and look great. Similar to the SJ9500, the bezel does not surround the LCD panel. The panel is attached on top of the frame and could be damaged if knocked on the side. Care should be taken when moving the TV, as it could be damaged if knocked, similar to what happened to our SJ8500.

Thickness
LG SK9000 Thickness Picture
Max Thickness : 1.89" (4.8 cm)

The TV has an average thickness but appears thin when viewed from the side due to the gentle angles of the back. It does not stick out when wall mounted.

Temperature
LG SK9000 Temperature picture
Maximum Temperature
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What it is: The peak temperature found on the TV.
When it matters: If the TV is placed in an enclosed space.
Good value: <35°C
Noticeable difference: 5°C
:
95 °F (35 °C)
Average Temperature
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What it is: The average temperature measured on the TV.
When it matters: If the TV is placed in an enclosed space.
Good value: <35°C
Noticeable difference: 5°C
:
91 °F (33 °C)

The TV runs fairly cool. The full array backlight results in a more uniform temperature throughout the back body of the TV. No part of it gets warm enough to cause any issues.

7.5 Build Quality
LG SK9000 Build quality picture

Average build quality. There is a gap between the main panel and exterior bezel which is a concern. Like the SJ8500, the LG 55SK9000 is almost entirely plastic, but there isn't too much flex.

The LG SK9000 produces a good picture quality. The native contrast ratio is decent, in dark rooms blacks will be grayer. It has a full array local dimming, but the algorithms are not responsive enough and we don't recommend using it on 'High'. It is much brighter than the SJ8500, but very small highlights get dimmed by the local dimming feature, which is the opposite of what should happen. It has an IPS panel and has a mediocre viewing angle, better than VA panels like the Sony X900F but worse than OLED panels like the LG C7. It also has excellent reflection handling, so it is a good choice for a variety of room types. The gray uniformity is decent, but there is noticeable dirty screen effect which is not good for sports fans.

6.5 Contrast
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What it is: Brightness difference between white and black. This is the main component of picture quality.
When it matters: Always, but especially when watching dark scenes.
Score components:
LG SK9000 Checkerboard Picture
Native Contrast
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What it is: Ratio of the white brightness divided by the blacks measured on our checkerboard test pattern with a white target of 100 cd/m².
When it matters: Dark scenes in a dark room.
Good value: > 3,000
Noticeable difference: 500
:
1306 : 1
Contrast with local dimming
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What it is: Ratio of the white brightness divided by the blacks measured on our checkerboard test pattern with local dimming turned on (maximum) with a white target of 100 cd/m².
When it matters: Dark scenes in a dark room.
Good value: > 3,000
Noticeable difference: 500
:
1311 : 1

The native contrast ratio on the SK9000PUA is decent, as is typical of IPS panels. When in a dark room, blacks will look more gray than black. This is less noticeable when in a brightly lit room.

The local dimming feature is ineffective at increasing the contrast ratio.

5.0 Local Dimming
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What it is: The lights behind the LCD layer adapt to the picture displayed, improving the contrast ratio.
When it matters: Dark scenes viewed in a dark room.
Score components: Subjectively assigned
Local Dimming
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What it is: Whether it has a feature that controls the LEDs behind the LCD layer, to match the picture and darkens the dark portion of it.
When it matters: On LED TVs only. Dark scenes viewed in a dark room.
:
Yes
Backlight
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What it is: Configuration of the lights of the backlight.
When it matters: Effectiveness of the local dimming.
Good value: Full-array/direct lighting is better for local dimming. As for the uniformity of the screen, it depends on the implementation. Some edge-lit TVs have more uniform blacks than some full-array TVs.
:
Full-Array

The local dimming feature on the SK9000 is not responsive enough. It reacts too slowly to moving highlights, and the dimming zones turn on and off too late. It is very similar to the Vizio M Series 2017. We do not recommend using the 'High' setting. 'Medium' or 'Low' work best depending on personal preference.

8.1 SDR Peak Brightness
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What it is: How bright the screen can get. Measured with local dimming and with SDR content.
When it matters: Bright living rooms; bright objects; SDR content.
SDR Real Scene Peak Brightness
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What it is: The maximum luminosity the TV can obtain while playing a movie or while watching a TV show. Our Real Scene was selected to represent a more regular movie condition. All measurements are made with the TV set to be as bright as possible, but with a 6500k white. Measured with local dimming on, max backlight and with an SDR signal. Scene: here.
When it matters: When watching movies and TV shows in SDR.
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
452 cd/m2
SDR Peak 2% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 2% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright highlights, present on screen for a short time
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
166 cd/m2
SDR Peak 10% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 10% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright objects, present on screen for a short time
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
376 cd/m2
SDR Peak 25% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 25% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
427 cd/m2
SDR Peak 50% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 50% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
459 cd/m2
SDR Peak 100% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 100% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
477 cd/m2
SDR Sustained 2% Window
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What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 2% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright highlights, persistent during a scene.
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
165 cd/m2
SDR Sustained 10% Window
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What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 10% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright objects, persistent during a scene.
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
375 cd/m2
SDR Sustained 25% Window
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What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 25% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
427 cd/m2
SDR Sustained 50% Window
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What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 50% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
459 cd/m2
SDR Sustained 100% Window
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What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 100% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
476 cd/m2
SDR ABL
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What it is: The coefficient of variation of the SDR sustained brightness, after linearizing for noticeable differences in luminosity
When it matters: Content with large bright areas, such as for PC or video game use, and sports such as hockey
Good value: <0.07
Noticeable difference: 0.01
:
0.065

Very good SDR peak brightness, bright enough for most rooms. Highlights appear dim, this is due to the poor local dimming feature. If you find highlights too dim, set the 'Local Dimming' setting to Low or Off.

This test was done with the 'Contrast' set to '90', which is our recommended value to get the brightest TV possible without causing white crush.

7.4 HDR Peak Brightness
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What it is: How bright the screen can get. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright living rooms; bright objects; HDR content.
HDR Real Scene Peak Brightness
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What it is: The maximum luminosity the TV can obtain while playing a movie or while watching a TV show. This scene was selected to represent a more realistic movie condition. All measurement are made with the TV set to be as bright as possible, but with a 6500k white. Measured with local dimming, max backlight and over HDR signal. Scene: here.
When it matters: When watching movies or watching TV show in HDR.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
520 cd/m2
HDR Peak 2% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 2% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright highlights, present on screen for a short time; especially for HDR content.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
427 cd/m2
HDR Peak 10% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 10% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright objects, present on screen for a short time; especially for HDR content.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
1180 cd/m2
HDR Peak 25% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 25% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright rooms; bright objects in HDR video.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
764 cd/m2
HDR Peak 50% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 50% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright rooms.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
586 cd/m2
HDR Peak 100% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 100% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright rooms.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
547 cd/m2
HDR Sustained 2% Window
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What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 2% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright highlights, persistent throughout a scene; especially for HDR content.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
181 cd/m2
HDR Sustained 10% Window
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What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 10% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright objects, persistent throughout a scene; especially for HDR content.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
362 cd/m2
HDR Sustained 25% Window
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What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 25% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright rooms; bright objects in HDR video.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
461 cd/m2
HDR Sustained 50% Window
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What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 50% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright rooms.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
525 cd/m2
HDR Sustained 100% Window
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What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 100% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright rooms.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
545 cd/m2
HDR ABL
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What it is: The coefficient of variation of the HDR sustained brightness, after linearizing for noticeable differences in luminosity
When it matters: HDR content with large bright areas, such as HDR gaming
Good value: <0.07
Noticeable difference: 0.01
:
0.066

Decent peak HDR brightness. Very small highlights are only noticeable in the sense that they are dimmer than the rest, again a symptom of the poor local dimming. Real scenes are bright enough for most rooms, although still far from the target 1000 cd/m² to fully appreciate HDR content.

6.5 Gray Uniformity
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What it is: Evenness of colors onscreen (not just gray).
When it matters: Solid colors. Sports, panning shots.
Score components:
LG SK9000 50% Uniformity Picture
50% Std. Dev.
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What it is: Average squared difference of pixels when displaying a mid 50% gray.
When it matters: Solid colors. Sports, panning shots.
Good value: < 2.5%
Noticeable difference: 1%
:
4.790 %
50% DSE
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What it is: High-frequency variance of uniformity. Dark spots on the screen.
When it matters: Solid colors. Sports, panning shots.
Good value: < 0.165%
Noticeable difference: 0.025%
:
0.239 %
LG SK9000 5% Uniformity Picture
5% Std. Dev.
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What it is: Average squared difference of pixels when displaying a mid 5% gray.
When it matters: Dark scenes.
Good value: < 1.15%
Noticeable difference: 1%
:
0.629 %
5% DSE
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What it is: High-frequency variance of uniformity. Dark spots on the screen.
When it matters: Dark scenes.
Good value: < 0.116%
:
0.096 %

Decent overall gray uniformity on the LG SK9000. The sides of the screen are darker than the rest, but this is not as noticeable as when it is darker in the center. There is noticeable dirty screen effect in the center; this will be especially noticeable when watching sports.

6.3 Viewing Angle
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What it is: Color accuracy when viewed from the side.
When it matters: Large living rooms with multiple viewing positions.
Score components:
LG SK9000 Color Shift Picture
Color Shift
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What it is: Angle where the colors noticeable shift compared to when viewed from directly in front of the TV. 0 ° means directly facing the TV. Measurements are up to a maximum of 75 °.
When it matters: Large living rooms with multiple viewing positions.
Good value: > 50°
Noticeable difference: 10°
:
25 °
LG SK9000 Brightness Picture
Brightness
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What it is: Angle where the brightness drops to 50% of the brightness directly in front of the TV. 0 ° means directly facing the TV. Measurements are up to a maximum of 75 °.
When it matters: Large living rooms with multiple viewing positions.
Good value: > 50°
Noticeable difference: 10°
:
31 °
LG SK9000 Black Level Picture
Black Level
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What it is: Angle where the black level drops to 50% of the black level directly in front of the TV. 0 ° means directly facing the TV. Measurements are up to a maximum of 75 °.
When it matters: Large living rooms with multiple viewing positions.
Good value: > 50°
Noticeable difference: 10°
:
75 °

Mediocre viewing angle on the SK9000, far better than most TVs with VA panels, but far worse than TVs with OLED panels. Colors and brightness shift when viewing off angle, making this TV an okay, but less than ideal choice for a room where people will frequently be watching from the side of the TV.

5.4 Black Uniformity
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What it is: Evenness of blacks.
When it matters: Dark scenes viewed in a dark room.
Score components:
LG SK9000 Native Black Uniformity Picture
Native Std. Dev.
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What it is: Average of the squared difference of the blacks.
When it matters: Dark scenes viewed in a dark room.
Good value: < 1%
Noticeable difference: 1%, but keep in mind that it varies a lot by unit, even of the same model; yours likely will not end up exactly like ours.
:
2.343 %
LG SK9000 Black Uniformity Picture with Local Dimming
Std. Dev. w/ L.D.
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What it is: Average of the squared difference of the blacks with Local Dimming enabled
When it matters: Dark scenes viewed in a dark room.
Good value: < 1%
Noticeable difference: 1%, but keep in mind that it varies a lot by unit, even of the same model; yours likely will not end up exactly like ours.
:
2.598 %

Poor black uniformity on the SK9000. When local dimming is off, there is noticeable backlight bleed across most of the screen.

With local dimming set to 'High', there is visible blooming around the image. The full array local dimming on the SK9000 is turning the zones off, but the results are much worse than other FALD TVs like the Sony X900F.

8.7 Reflections
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What it is: How much light is reflected by the TV.
When it matters: Bright rooms.
Score components:
LG SK9000 Reflections Picture LG SK9000 Average Room Off Picture LG SK9000 Bright Room Off Picture
Screen Finish
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What it is: Type of coating on the screen.
When it matters: Bright objects in the direct reflection path (for example, opposite the TV).
Good value: Glossy is good for ambient light, but not for direct reflections.
:
Semi-gloss
Total Reflections
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What it is: The amount of light which is reflected off the screen, in all directions.
When it matters: When watching TV in a bright room, with lamps, windows or walls which reflect directly off the screen.
Good value: 4.5 %
Noticeable difference: 0.5 %
:
3.4 %
Indirect Reflections
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What it is: The amount of light reflected off the screen, ignoring direct (mirror-like) reflections
When it matters: Watching TV in a bright room, without sunlight or lamps directed at the TV
Good value: 1.0 %
Noticeable difference: 0.5 %
:
0.5 %

Decent reflection handling on the SK9000, identical to the SJ8500. The semi-gloss finish diffuses reflections a bit, reducing their intensity. These results should be fine for most rooms.

7.7 Pre Calibration
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What it is: TV's color accuracy before a full calibration. Only the picture mode, color temperature, and backlight level were changed.
When it matters: All video on an uncalibrated TV. This represents most people's use cases.
Score components:
LG SK9000 Pre Calibration Picture LG SK9000 Pre Gamma Curve Picture LG SK9000 Pre Color Picture
Picture Mode
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What it is: The picture mode used to do the 'Pre Calibration' measurements.
:
Expert (Dark Room)
White Balance dE
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What it is: Average inaccuracy of shades of gray.
When it matters: Overall color temperature of all video.
Good value: < 3
Noticeable difference: 1
:
2.77
Color dE
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What it is: Average inaccuracy of colors.
When it matters: All colors.
Good value: < 3
Noticeable difference: 1
:
2.65
Gamma
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What it is: Brightness of shades of gray.
When it matters: Shadows.
Good value: Between 2.1 and 2.3 (our target is 2.2)
Noticeable difference: 0.1
:
2.13
Color Temperature
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What it is: The color temperature is a measure of the color of light. A colder color temperature (7000K) will look bluer and a warmer color temperature (4000K) will look yellower/redder. 6500K is the standard color temperature use in the TV and film industry as program, film, and photography directors usually work on monitors calibrated on the 6500k color temperature and do their color correction base on what they see on those monitors.
When it matters: To get the most accurate picture when watching TV shows, movies or video games. This is particularly for skin tones.
Good value: 6500K
Noticeable difference: 400K
:
7043 K

The most accurate results out of the box were obtained with the 'Expert (Dark Room)' picture mode. Color and White Balance dE were good, but the color temperature was cold, giving everything a slightly blue tint. The color and white balance delta is low enough that most people won't notice.

9.4 Post Calibration
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What it is: TV's color accuracy after a full calibration with a spectrophotometer.
When it matters: All video on a TV that has been professionally calibrated. This isn't that useful, because most TVs can achieve a pretty good calibration if you spend enough time on them.
Score components:
LG SK9000 Post Calibration Picture LG SK9000 Post Gamma Curve Picture LG SK9000 Post Color Picture
Picture Mode
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What it is: The picture mode used to do the calibration. We usually go for the picture mode that gives us the more control over all the picture quality setting.
:
Expert (Dark Room)
White Balance dE
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What it is: Average inaccuracy of shades of gray.
When it matters: Overall color temperature of all videos.
Good value: < 3
Noticeable difference: 1
:
0.11
Color dE
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What it is: Average inaccuracy of colors.
When it matters: All colors.
Good value: < 3
Noticeable difference: 1
:
1.67
Gamma
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What it is: Brightness of shades of gray.
When it matters: Shadows.
Good value: Between 2.1 and 2.3 (our target is 2.2)
Noticeable difference: 0.1
:
2.19
Color Temperature
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What it is: The color temperature is a measure of the color of light. A colder color temperature (7000K) will look bluer and a warmer color temperature (4000K) will look yellower/redder. 6500K is the standard color temperature use in the TV and film industry as program, film, and photography directors usually work on monitors calibrated on the 6500k color temperature and do their color correction base on what they see on those monitors.
When it matters: To get the most accurate picture when watching TV shows, movies or video games. This is particularly for skin tones.
Good value: 6500K
Noticeable difference: 400K
:
6508 K

Excellent white balance after calibration. Color dE was still a bit high, as the Color Management System in the SK9000 was not very effective at correcting the blue errors. Gamma is very close to our target, shifting a little off target at the low and high end of our inputs.

You can see our recommended settings here.

8.0 480p Input
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What it is: Quality of a 480p input.
When it matters: Standard definition TV, DVDs.
Score components: Subjectively assigned
LG SK9000 480p Picture

There were no obvious issues upscaling older 480p content like DVDs on the LG SK9000.

8.0 720p Input
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What it is: Quality of a 720p input.
When it matters: HD channels, some streaming videos.
Score components: Subjectively assigned
LG SK9000 720p Picture

720p content is scaled well on the SK9000 with no obvious over softening or artifacts.

9.0 1080p Input
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What it is: Quality of a 1080p input.
When it matters: Blu-rays, streaming video, video files, video games.
Score components: Subjectively assigned
LG SK9000 1080p Picture

1080p content, like Blu-rays look good.

10 4k Input
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What it is: Quality of a 4k UHD input.
When it matters: Streaming video, UHD Blu-rays, some PCs.
Score components: Subjectively assigned
LG SK9000 4k Picture

Native 4k content is clear and sharp.

8.1 Color Gamut
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What it is: How many colors the TV can display.
When it matters: HDR content. Includes some streaming videos and UHD Blu-rays.
Score components:
Wide Color Gamut
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What it is: Whether the TV has an option to enable wide color gamuts.
When it matters: HDR content. Includes some streaming videos and UHD Blu-rays.
:
Yes
LG SK9000 Color Gamut DCI-P3 Picture
DCI P3 xy
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What it is: Coverage of the DCI P3 colorspace on CIE 1931 xy.
When it matters: DCI P3 content. Includes HDR, UHD Blu-rays.
Good value: > 90%
Noticeable difference: 5%
:
88.98 %
DCI P3 uv
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What it is: Coverage of the DCI P3 colorspace on CIE 1976 u' v'.
When it matters: DCI P3 content. Includes HDR, UHD Blu-rays.
Good value: > 90%
Noticeable difference: 5%
:
94.51 %
LG SK9000 Color Gamut Rec.2020 Picture
Rec 2020 xy
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What it is: Coverage of the Rec.2020 colorspace on CIE 1931 xy.
When it matters: Rec.2020 content. Includes HDR, UHD Blu-rays.
Good value: > 90%
Noticeable difference: 5%
:
65.97 %
Rec 2020 uv
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What it is: Coverage of the Rec.2020 colorspace on CIE 1976 u' v'.
When it matters: Rec.2020 content. Includes HDR, UHD Blu-rays.
Good value: > 90%
Noticeable difference: 5%
:
73.14 %
LG SK9000 EOTF

Good coverage of the P3 color space, the TV is able to display a wide color gamut.

The HDR EOTF in the 'Technicolor Expert' picture mode is too bright for most of our PQ curve, and rolls of gradually at the peak brightness of the TV. The 'PC' and 'Game' EOTF curves are very similar to that of 'Technicolor Expert', which is good.

When displaying HDR content in 'PC Mode', the SK9000 does not properly detect the wide color gamut so colors appear washed. This is the same as the C8.

6.9 Color Volume
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What it is: How many colors a TV can display at different luminosity levels.
When it matters: HDR content. Includes some streaming videos, UHD Blu-rays and HDR games.
LG SK9000 P3 Color Volume ITP Picture
Normalized DCI P3 Coverage ITP
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What it is: How much of the DCI-P3 colorspace a TV can display at different luminosity levels
When it matters: HDR content. Includes some streaming videos, UHD Blu-rays and HDR games.
Good value: 80%
Noticeable difference: 5%
:
76.7 %
10,000 cd/m² DCI P3 Coverage ITP
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What it is: How much of the DCI-P3 colorspace a TV can display at different luminosity levels when compared to an ideal 10,000 nit TV
When it matters: HDR content. Includes some streaming videos, UHD Blu-rays and HDR games.
:
34.5 %
LG SK9000 2020 Color Volume ITP Picture
Normalized Rec 2020 Coverage ITP
Show Help
What it is: How much of the Rec. 2020 colorspace a TV can display at different luminosity levels
When it matters: HDR content. Includes some streaming videos, UHD Blu-rays and HDR games.
Good value: 80 %
Noticeable difference: 5 %
:
62.1 %
10,000 cd/m² Rec 2020 Coverage ITP
Show Help
What it is: How much of the Rec 2020 colorspace a TV can display at different luminosity levels when compared to an ideal 10,000 nit TV
When it matters: HDR content. Includes some streaming videos, UHD Blu-rays and HDR games.
:
27.3 %

Decent color volume, but the LG 55SK9000 is unable to produce deep, dark blacks due to its poor contrast ratio and ineffective local dimming. It is also inconsistent in producing bright saturated colors. Color volume is worse than last year's SJ8500.

8.5 Gradient
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What it is: How finely levels of color can be displayed.
When it matters: Details in shadows, sky and skin tones. Matters more for HDR content.
LG SK9000 Gradient Picture
Color Depth
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What it is: Number of bits per pixel to represent a specific color. Note: we consider 8-bit with dithering to be equivalent to 10-bit, as long as the 10-bit gradient looks smooth.
When it matters: HDR content like UHD Blu-ray players. Won't matter for cable TV, regular Blu-ray movies, video game consoles or content displayed from a Windows PC. Those are limited to 8-bit color.
Good value: 10-bit.
Noticeable difference: 1 bit.
:
10 Bit
Red (Std. Dev.)
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What it is: The standard deviation of the color differences (dE) between subsequent 10 bit red shades.
When it matters: Details in skin tones, sunsets, and other reddish objects. Matters more for HDR content.
Good value: < 0.12 dE
Noticeable difference: 0.01 dE
:
0.101 dE
Green (Std. Dev.)
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What it is: The standard deviation of the color differences (dE) between subsequent 10 bit green shades.
When it matters: Details in ocean shades and other greenish objects. Matters more for HDR content.
Good value: < 0.12 dE
Noticeable difference: 0.01 dE
:
0.120 dE
Blue (Std. Dev.)
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What it is: The standard deviation of the color differences (dE) between subsequent 10 bit blue shades.
When it matters: Details in skies, water and other blueish objects. Matters more for HDR content.
Good value: < 0.12 dE
Noticeable difference: 0.01 dE
:
0.093 dE
Gray (Std. Dev.)
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What it is: The standard deviation of the color differences (dE) between subsequent 10 bit gray shades.
When it matters: Details in dull colors, such as shadows, glow and urban scenes. Matters more for HDR content.
Good value: < 0.12 dE
Noticeable difference: 0.01 dE
:
0.064 dE

There were some issues with the SK9000's gradient handling that are not reflected in our testing score. Large areas of near-uniform color showed large areas of banding, worse than the C8. This can be reduced by enabling the TV's 'MPEG Noise Reduction' feature, which enables the gradient smoothing feature of the SK9000. This helps reduce banding but also causes a loss of detail.

9.9 Temporary Image Retention
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What it is: How much a static image is retained on a TV screen after a certain amount of time.
When it matters: When watching TV show, playing video games or when using your TV as a PC monitor.
LG SK9000 Image Retention Picture
IR after 0 min recovery
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What it is: Image retention measured right after the static image exposure, without recovery time.
When it matters: When changing channels while watching TV, right after changing the type of content (i.e. stopping playing video game to watch a movie) or changing input.
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0.06 %
IR after 2 min recovery
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What it is: Image retention measured after a recovery time of 2 minutes.
When it matters: When changing channels while watching TV, right after changing the type of content (i.e. stopping playing video game to watch a movie) or changing input.
Good value: 0 is perfect
Noticeable difference: 0.015%
:
0.00 %
IR after 4 min recovery
Show Help
What it is: Image retention measured after a recovery time of 4 minutes.
When it matters: When changing channels while watching TV, right after changing the type of content (i.e. stopping playing video game to watch a movie) or changing input.
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0.00 %
IR after 6 min recovery
Show Help
What it is: Image retention measured after a recovery time of 6 minutes.
When it matters: When changing channels while watching TV, right after changing the type of content (i.e. stopping playing video game to watch a movie) or changing input.
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0.00 %
IR after 8 min recovery
Show Help
What it is: Image retention measured after a recovery time of 8 minutes.
When it matters: When changing channels while watching TV, right after changing the type of content (i.e. stopping playing video game to watch a movie) or changing input.
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0.00 %
IR after 10 min recovery
Show Help
What it is: Image retention measured after a recovery time of 10 minutes.
When it matters: When changing channels while watching TV, right after changing the type of content (i.e. stopping playing video game to watch a movie) or changing input.
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0.00 %

The SK9000 does show some signs of image retention. Only a faint outline of the logo is visible, and it is completely gone before 2 minutes recovery. It is an improvement over the SJ8500, and there is not enough persistence for it to be an issue for most people.

10 Permanent Burn-In Risk
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What it is: The risk of developing a persistent image retention, also known as burn-in, after being exposed to a static image for a prolonged time
When it matters: When watching TV shows, playing video games or when using your TV as a PC monitor where static content is present
Score components:
Permanent Burn-In Risk
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What it is: If the TV faces a risk of developing permanent burn-in after being expose, for a long period of time, to static images.
When it matters: When watching TV shows with static logos or banners (news or sports channels), when playing video games with a HUD (head up display), and when using a TV as a PC monitors.
:
No

While IPS panels can have some temporary image retention, there doesn't appear to be any risk of permanent burn-in as seen in our long-term test.

Pixels

The LG SK9000PUA has great motion handling. The response time is slightly improved over the SJ8500, resulting in fluid motion with a short motion trail and low stutter with 24 and 60 fps content. The backlight has been completely redesigned over the SJ8500 and 9500, but there is still noticeable flicker when dimming the backlight. The SK9000 adds black frame insertion, and the TV can reduce the flicker frequency to 60Hz, which helps motion appear more fluid. Movies played from any source appear smooth, although the TV is inconsistent in its ability to remove judder from 60 fps content.

8.5 Response Time
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What it is: Amount of blur in fast motion.
When it matters: Sports, video games.
Score components:
LG SK9000 Motion Blur Picture LG SK9000 Response Time Chart
80% Response Time
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What it is: How quickly pixels can reach 80% of a full transition from one color to another.
When it matters: Fast movement.
Good value: < 8 ms
Noticeable difference: 4 ms
:
5.1 ms
100% Response Time
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What it is: How quickly pixels can fully transition from one color to another.
When it matters: Fast movement.
Good value: < 20 ms
Noticeable difference: 10 ms
:
14.4 ms

Excellent response time on the LG 55SK9000PUA, great for watching sports or fast paced movies. Most of the blur visible in the photo is caused by 60 fps persistence when there is no flicker, but there is a small motion blur trail behind the logo. There is some overshoot on the 100% transitions but it is minor and should not cause any ghosting. Only a short trail can be seen following fast-moving objects.

4.0 Flicker-Free
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What it is: How noticeable flicker is on the screen, when all optional flicker has been disabled.
When it matters: All usages, but particularly when viewing fast motion (such as in sports and video games) or when using the TV as a PC monitor.
Score components:
LG SK9000 Backlight chart
Flicker-Free
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What it is: Whether the screen will be perceived as having no flicker during normal viewing conditions.
When it matters: When flicker is especially bothersome, such as when using the TV as a PC monitor.
Good value: Yes
:
No
PWM Dimming Frequency
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What it is: The flicker frequency of the screen, when all optional flicker has been disabled.
When it matters: All usages, but particularly when viewing fast motion (such as in sports and video games) or when using the TV as a PC monitor.
Good value: 0 Hz or very high frequencies (> 300 Hz). Frequencies that are multiples of 60Hz are better.
:
120 Hz

The SK9000PUA uses PWM to dim the backlight, which helps to clear up motion slightly, but results in some duplications following fast-moving objects, as can be seen in the motion blur box photo. This causes the backlight to flicker, starting at any backlight setting other than '100'. It uses a different type of PWM dimming than the SJ8500, so it is a bit less noticeable. People sensistive to flicker should consider a nearly flicker-free alternative, like the Sony X900F.

9.3 Black Frame Insertion (BFI)
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What it is: How effective the TV's flickering capabilities are in making motion look clearer, when flicker is desired.
When it matters: When flicker is desired by the user. Flicker is especially useful to make motion look clearer when viewing 60 fps content (sports, video games) and when using motion interpolation.
LG SK9000 BFI Picture LG SK9000 BFI Frequency Picture
Optional BFI
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What it is: Option to turn the screen black between frames.
When it matters: When flicker is desired by the user. Flicker is especially useful to make motion look clearer when viewing 60 fps content (sports, video games) and when using motion interpolation.
Good value: Yes
:
Yes
Min Flicker for 60 fps
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What it is: Lowest possible frequency of flickering pattern when playing 60 fps content.
When it matters: When viewing fast motion such as sports and video games.
Good value: 60 Hz
Noticeable difference: 20 Hz
:
60 Hz
60 Hz for 60 fps
Show Help
What it is: Whether the screen can flicker at 60 Hz when playing 60 fps content.
When it matters: When playing 60 fps content, such as sports and video games.
Good value: Yes
:
Yes
120 Hz for 120 fps
Show Help
What it is: Whether the screen can flicker at 120 Hz when playing 120 fps content.
When it matters: When playing 120 fps content, such as when using motion interpolation on a 120 Hz TV.
Good value: Yes
:
Yes
Min Flicker for 60 fps in Game Mode
Show Help
What it is: Lowest possible frequency of flickering pattern when playing 60 fps content in Game Mode.
When it matters: When playing video games with fast motion.
Good value: 60 Hz
Noticeable difference: 20 Hz
:
60 Hz

When 'Motion Pro' is enabled, the backlight flickers to match the refresh rate of the content on the screen to reduce persistence blur. With 120 Hz content the natural refresh rate of the backlight is better, so Motion Pro' must be set to Off.

10 Motion Interpolation
Show Help
What it is: Also known as 'Soap Opera Effect'. It is an optional feature that increases the frame rate of the video, smoothing movement.
When it matters: If you like the look of smoothed video. Not everyone does.
LG SK9000 Motion Interpolation (30 fps) Picture
Motion Interpolation (30 fps)
Show Help
What it is: Whether the TV can take a 30 fps input and heighten the frame rate to at least 60 fps.
When it matters: 30 fps or lower videos. Includes movies, TV shows, some video games.
:
Yes
LG SK9000 Motion Interpolation (60 fps) Picture
Motion Interpolation (60 fps)
Show Help
What it is: Whether the TV can take a 60 fps input and heighten the frame rate to at least 100 fps.
When it matters: 60 fps videos. Includes some video games, some sports channels.
:
Yes

The SK9000 has a native 120hz panel and can interpolate lower frame rate content up to 120 fps. Motion interpolation can look very strange to people, and in scenes with fast motion, there are some artifacts.

To enable motion interpolation (also called the Soap Opera Effect) set 'TruMotion' to 'User'. For a 30fps source increase the 'De-Judder' slider, and for a 60fps source increase the 'De-Blur' slider.

7.6 Stutter
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What it is: Jarring effect caused by static frame time during motion sequences
When it matters: When watching content with long panning shots and other smooth movement
Frame Hold Time @ 24 fps
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What it is: Time that frame is static during 24Hz videos such as movies
When it matters: When watching movies and other low frame rate content which contain panning shots
Good value: < 24 ms
Noticeable difference: 5 ms
:
27.3 ms
Frame Hold Time @ 60 fps
Show Help
What it is: Time that frame is static during 60 fps content such as TV shows
When it matters: When watching 60 fps content containing slow panning shots (such as field sports)
Good value: < 24 ms
Noticeable difference: 5 ms
:
2.3 ms

The LG SK9000PUA displays 60 and 24 fps content without stutter. The response time of the LCD results in smooth motion even in long panning shots.

8.9 24p Judder
Show Help
What it is: Whether 24p content can play without any judder.
When it matters: Only 24p content (mostly just movies).
Judder-Free 24p
Show Help
What it is: Judder-free movies over 24p signal.
When it matters: Blu-ray and DVD movies; 24 hz PC signal.
:
Yes
Judder-Free 24p via 60p
Show Help
What it is: Judder-free movies over 60p signal.
When it matters: Movies from streaming devices (Apple TV, Fire TV, etc.); 60 hz PC signal.
:
No
Judder-Free 24p via 60i
Show Help
What it is: Judder-free movies over 60i signal.
When it matters: Movies from cable/satellite boxes.
:
Yes
Judder-Free 24p via Native Apps
Show Help
What it is: Judder-free movies when playing from native apps.
When it matters: Movies from streaming native apps (Netflix, Amazon TV, etc.).
:
Yes

The SK9000PUA is able to consistently remove judder from 24 fps content, but is inconsistent in its handling of 60 fps content.

To enable this feature, for any content, the 'Real Cinema' option must be turned on.

0 Variable Refresh Rate
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What it is: How frequently the TV can refresh and show new frames, and whether it can vary its refresh rate in real time using technologies like HDMI Forum's Variable Refresh Rate
When it matters: Mostly for gaming, but does provide a little better motion during normal usage.
Score components:
Native Refresh Rate : 120 Hz
Variable Refresh Rate
Show Help
What it is: Feature that allows the TV to synchronize its refresh rate with the input device's output and reduces stuttering and screen tearing.
When it matters: Almost every usage, but is most noticeable when gaming where constant fluctuation in framerate cause distracting artifacts.
:
No
VRR Maximum
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What it is: The maximum frequency covered by the Variable Refresh Rate feature of the TV.
When it matters: Any time the VRR feature is enabled.
Good value: Matches Refresh rate
Noticeable difference: 10 Hz
:
N/A
VRR Minimum
Show Help
What it is: The lowest frequency covered by the TV's Variable Refresh Rate feature.
When it matters: When using the VRR feature of the TV at lower frame rates.
Good value: 30 Hz
:
N/A
VRR Supported Connectors
Show Help
What it is: The inputs which support a variable refresh rate (eg. HDMI, DisplayPort)
When it matters: When gaming with different consoles or graphics cards.
:
N/A

The SK9000 does not support any of the variable refresh rates technologies such as G-Sync, FreeSync, or the native VRR which will be available in HDMI 2.1.

9.3

Inputs

Show Help
Score components:

Great low input lag on the LG SK9000. The input lag is low on any supported resolution except in 4k with HDR enabled, although it is still low enough for most gamers. It supports chroma 4:4:4 and 1080p @ 120 Hz, great for use as a PC Monitor. Like the C8, it does not support 1440p resolution.

9.4 Input Lag
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What it is: Delay between input and onscreen reaction.
When it matters: Video games; when TV is used as PC monitor.
1080p @ 60Hz
Show Help
What it is: Lowest input lag possible on TV with a 1080p @ 60Hz input.
When it matters: Video games and also when TV is used as PC monitor.
Good value: < 40 ms
Noticeable difference: 15 ms
:
15.7 ms
1080p @ 60Hz + HDR
Show Help
What it is: Lowest input lag possible on the TV when displaying 1080p @ 60Hz with HDR.
When it matters: HDR video games from a console outputting a 1080p signal.
Good value: < 40 ms
Noticeable difference: 15 ms
:
15.4 ms
1080p @ 60Hz Outside Game Mode
Show Help
What it is: Lowest input lag possible on the TV when displaying 1080p @ 60Hz in a fully featured picture mode.
When it matters: For playing video games while retaining access to all features of the TV.
Good value: < 40 ms
Noticeable difference: 15 ms
:
36.2 ms
1080p @ 120 Hz
Show Help
What it is: Lowest input lag possible on TV with a 1080p @ 120Hz input.
When it matters: When the TV is used as PC monitor.
Good value: < 40 ms
Noticeable difference: 15 ms
:
13.8 ms
4k @ 60Hz
Show Help
What it is: Lowest input lag possible on TV when displaying 4k @ 60Hz.
When it matters: Video games and also when TV is used as PC monitor.
Good value: < 40 ms
Noticeable difference: 15 ms
:
15.6 ms
4k @ 60Hz + HDR
Show Help
What it is: Lowest input lag possible on TV when displaying 4k @ 60Hz with HDR.
When it matters: HDR Video games.
Good value: < 40 ms
Noticeable difference: 15 ms
:
23.6 ms
4k @ 60Hz @ 4:4:4
Show Help
What it is: Lowest input lag possible on TV when displaying 4k @ 60Hz @ 4:4:4.
When it matters: PC Monitor
Good value: < 40 ms
Noticeable difference: 15 ms
:
15.1 ms
4k @ 60Hz @ 4:4:4 + 8 bit HDR
Show Help
What it is: Lowest input lag possible on TV when displaying 4k @ 60Hz @ 4:4:4 with HDR enabled at 8 bit
When it matters: PC Monitor with an HDR capable graphic card
Good value: < 40 ms
Noticeable difference: 15 ms
:
N/A
4k @ 60Hz Outside Game Mode
Show Help
What it is: Lowest input lag possible on the TV when displaying 4k @ 60Hz in a fully featured picture mode.
When it matters: For playing video games while retaining access to all features of the TV.
Good value: < 40 ms
Noticeable difference: 15 ms
:
44.5 ms
4k With Interpolation
Show Help
What it is: Lowest input lag for 4k content when the motion interpolation feature is turned on.
When it matters: When you want to play video games with the Soap Opera Effect enabled.
Good value: < 40 ms
Noticeable difference: 15 ms
:
86.2 ms
4k @ 120 Hz
Show Help
What it is: Lowest input lag possible on TV with a 4k @ 120Hz input.
When it matters: When the TV is used as PC monitor.
Good value: < 40 ms
Noticeable difference: 15 ms
:
N/A
Variable Refresh Rate
Show Help
What it is: Lowest input lag possible on TV with a variable refresh rate
When it matters: When gaming with a device which supports variable refresh rates, such as the Xbox One X or a PC.
:
N/A

Excellent low input lag on the SK9000. Strangely, the input lag is slightly higher on 4k content with HDR enabled (this is the case with the C8 too), but it is still low enough that HDR games will be responsive for most games.

8.3 Supported Resolutions
Show Help
What it is: Different resolutions supported by TV.
When it matters: PC monitor usage.
Score components:
  • 17% 1080p @ 60Hz @ 4:4:4
  • 17% 1080p @ 120Hz
  • 17% 1440p @ 60Hz
  • 17% 4k @ 30Hz @ 4:4:4
  • 17% 4k @ 60Hz
  • 17% 4k @ 60Hz @ 4:4:4
1080p @ 60Hz @ 4:4:4
Show Help
What it is: Crisp text on 1060p @ 60 hz signal.
When it matters: PC productivity and 60 fps gaming.
:
Yes
1080p @ 120Hz
Show Help
What it is: 120 fps 1080p signal supported.
When it matters: PC gaming.
:
Yes
1440p @ 60Hz
Show Help
What it is: 60 fps 1440p signal supported.
When it matters: PC productivity and gaming.
:
No
4k @ 30Hz @ 4:4:4
Show Help
What it is: Crisp text on 4k @ 30 hz signal.
When it matters: PC productivity and gaming.
:
Yes
4k @ 60Hz
Show Help
What it is: 60 fps 4k signal supported.
When it matters: PC productivity and gaming.
:
Yes
4k @ 60Hz @ 4:4:4
Show Help
What it is: Crisp text on 4k @ 60 hz signal.
When it matters: Productivity and 60 fps gaming in 4k.
:
Yes
4k @ 120Hz
Show Help
What it is: 4k 120Hz signal supported
When it matters: PC gaming
:
No

There were no issues with most common resolutions. The LG 55SK9000 does not support 1440p resolution. When in PC Mode with HDR enabled, the TV does not properly support 4:4:4 color and colors appear washed out. In PC Mode a sharpness setting of '0' is the true 0 level.

Side Inputs
Rear Inputs
Total Inputs
HDMI : 4
USB : 3
Digital Optical Audio Out : 1
Analog Audio Out 3.5mm : 0
Analog Audio Out RCA : 0
Component In : 0
Composite In : 1 (incl. adapter)
Tuner (Cable/Ant) : 1
Ethernet : 1
DisplayPort : 0
IR In : 0
SD/SDHC : 0

The SK9000 does not have a component input. It supports composite input via the included adapter.

The TV does not have an analog audio output. To connect a wireless headphone you will need a digital to analog converter like this one.

Inputs Specifications
HDR10
Show Help
What it is: Standard HDR format.
When it matters: Most common format. All UHD Blu-ray discs are required to have it.
:
Yes
Dolby Vision
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What it is: Better format, due to its dynamic nature.
When it matters: Dolby Vision mastered content. Current available from streaming services (Netflix, Amazon Video), some Blu-Ray players, the Apple TV 4k and ChromeCast Ultra.
:
Yes
HLG
Show Help
What it is: HLG or Hybrid Log Gamma is a broadcast HDR format.
When it matters: HLG capable sources such as Youtube or OTA broadcasts in specific regions. Backwards compatible with SDR TVs.
:
Yes
3D
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What it is: Optional 3D video capability on TV.
When it matters: 3D movies & videos.
:
No
5.1 Passthrough ARC Dolby Digital
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What it is: TV can receive and pass Dolby Digital 5.1 signal to receiver via HDMI ARC.
When it matters: 5.1 audio on DVDs and Blu-rays.
:
Yes
5.1 Passthrough ARC DTS
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What it is: TV can receive and pass DTS 5.1 signal to receiver via HDMI ARC.
When it matters: 5.1 audio on DVDs and Blu-rays.
:
Yes
5.1 Passthrough Optical Dolby Digital
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What it is: TV can receive and pass Dolby Digital signal to receiver via digital optical.
When it matters: 5.1 audio on DVDs and Blu-rays.
:
Yes
5.1 Passthrough Optical DTS
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What it is: TV can receive and pass DTS signal to receiver via digital optical.
When it matters: 5.1 audio on DVDs and Blu-rays.
:
Yes
HDMI 2.0 Full Bandwith
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What it is: HDMI 2.0 is the main used HDMI standard and supports a range of video resolutions and refresh rates up to 4k@60Hz, with a total maximum bandwidth up to 18Gbps.
:
Yes (HDMI 1,2,3,4)
HDMI 2.1 Full Bandwidth
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What it is: HDMI 2.1 is the latest update to the HDMI standard and supports a range of higher video resolutions and refresh rates including 8K60 and 4K120, and resolutions up to 10K. Dynamic HDR formats are also supported, and bandwidth capability is increased up to 48Gbps.
:
No
ARC
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What it is: Audio Return Channel (ARC) enables a TV to transmit, via an HDMI cable, audio data to an A/V receiver, without the need for any extra audio cables.
When it matters: When connecting your audio/video receiver directly to your TV via an HDMI cable.
:
Yes (HDMI 2)
USB 3.0
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What it is: USB 3.0 is the latest USB standard which can transfer data up to 5 Gbit/s, and is easily recognizable due to its blue color-coding of the connector.
:
No
HDCP 2.2 : Yes (HDMI 1,2,3,4)
CEC : Yes
MHL : No
Variable Analog Audio Out : No
Wi-Fi Support : Yes (2.4 GHz, 5 GHz)
6.8

Sound Quality

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What it is: How well and accurately the audio is reproduced.
When it matters: When a good and accurate sound reproduction is needed.
Score components:

The sound quality of the LG SK9000 is decent for a TV. The frequency response is fine, and the TV can get loud without producing too much distortion. Despite this, it is no match for a dedicated surround sound system or even a cheap soundbar. It should be noted that this TV was tested with the Magic Sound Tuning enabled.

6.7 Frequency Response
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What it is: How accurately the sound level of each frequency is being produced.
When it matters: For a balanced and neutral sound.
LG SK9000 Frequency Response
Low-Frequency Extension
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What it is: The lowest frequency at which the frequency response reaches -3dB of the target response.
When it matters: Movies, Gaming. Shows how extended the bass is.
Good value: < 60Hz
Noticeable difference: 10Hz
:
67.27 Hz
Std. Dev. @ 70
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What it is: The amount of deviation (weighted standard deviation) in frequency response measured at 70dB SPL, as compared to a target response that would sound perfectly balanced to most people.
When it matters: Shows the TV's frequency response at quiet listening levels
Good value: < 4 dB
Noticeable difference: 0.5 dB
:
3.49 dB
Std. Dev. @ 80
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What it is: The amount of deviation (weighted standard deviation) in frequency response measured at 80dB SPL, as compared to a target response that would sound perfectly balanced to most people.
When it matters: Shows the TV's frequency response at moderate listening levels
Good value: < 4 dB
Noticeable difference: 0.5 dB
:
4.67 dB
Std. Dev. @ Max
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What it is: The amount of deviation (weighted standard deviation) in frequency response measured with the TV at maximum volume, as compared to a target response that would sound perfectly balanced to most people.
When it matters: Shows the TV's frequency response at under maximum load
Good value: < 4 dB
Noticeable difference: 2 dB
:
7.29 dB
Max
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What it is: Maximum volume reached by the TV at their optimum viewing distance (size dependent)
When it matters: For listening to loud audio.
Good value: > 88 dB
Noticeable difference: 2 dB
:
89.0 dB SPL
Dynamic Range Compression
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What it is: The amount of difference between the TVs frequency response performance at 70dB SPL and Max dB SPL. Too much compression will result in pumping in the sound.
When it matters: When an accurate and free-of-pumping performance is required at higher volumes
Good value: < 3dB
Noticeable difference: 0.5
:
5.37 dB

Decent frequency response for a TV. It can get very loud, but there is some dynamic range compression as the volume is increased. The low frequency extension is good, much better than most TVs, so it can produce a decent amount of bass. However, the room correction system (Magic Sound Tuning) wasn't able to correct the modes of our test room (the bumps between 200Hz and 300Hz).

7.0 Distortion
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What it is: Deformation of an output signal compared to its input, usually clipping, harmonic distortion, or inter-modulation distortion caused by non-linear behavior of the sound system.
When it matters: When a clean, pure and transparent reproduction is desired.
Score components:
LG SK9000 Total Harmonic Distortion
Weighted THD @ 80
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What it is: The overall amount of harmonic distortion measured at 80dB SPL. To make the score more perceptually relevant, more weight is given to the higher frequencies.
When it matters: How pure the sound is at moderate listening levels.
Good value: < 0.100
Noticeable difference: 0.100
:
0.453
Weighted THD @ Max
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What it is: The overall amount of harmonic distortion measured at the TV's maximum SPL. To make the score more perceptually relevant, more weight is given to the higher frequencies.
When it matters: How pure the sound is at moderate listening levels.
Good value: < 0.100
Noticeable difference: 0.100
:
1.325
IMD @ 80
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What it is: The average amount of inter-modulation distortion produced by the TV under maximum load. The percentage shown here is the average result of 3 separate test signals/standards: SMPTE, DIN, & CCIF
When it matters: When a clean and free of aliasing reproduction is desired
Good value: < 5%
Noticeable difference: 2
:
1.87 %
IMD @ Max
Show Help
What it is: The average amount of inter-modulation distortion produced by the TV under maximum load. The percentage shown here is the average result of 3 separate test signals/standards: SMPTE, DIN, & CCIF
When it matters: When a clean and free of aliasing reproduction is desired
Good value: < 5%
Noticeable difference: 2
:
3.18 %

The harmonic distortion of the TV is slightly better than average. It is contained at lower volumes, and even at maximum it isn't too bad. The sharp distortion peaks at around 2k and 7k can make the sound of these frequencies a bit harsh.

8.4

Smart Features

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Score components:
  • 42% Interface
  • 2% Ad-Free
  • 37% Apps and Features
  • 16% Remote
  • 3% Remote App
LG SK9000 Smart TV Picture
Smart OS : WebOS
Version : 4.0

The LG SK9000 runs the latest version of LG's smart operating system, webOS. It has a decent selection of built-in apps, and the LG content store provides quick access to thousands of third-party apps, although it is not as good as the Google Play Store found on Samsung or Sony TVs. The remote is compact and well built. The design is not as polished as the one found with high-end Samsung or Sony TVs, but it works well. The new voice control functions are very powerful and work well, and can interface with a variety of other devices.

8.5 Interface
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What it is: The usability, features and performance of the main interface of the TV, not including the interfaces of the apps themselves.
When it matters: Anytime when using the TV, but especially when changing settings and using apps.
Score components: Subjectively assigned
Ease of Use
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What it is: How easy the interface is to navigate, affected by the organization of its layout, placing frequently accessed elements in areas that are faster to access, etc.
When it matters: When using the smart features.
:
Easy
Smoothness
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What it is: How smooth the interface is to navigate, affected by lag and frame drops.
When it matters: When using the smart features.
:
Average
Time Taken to Select YouTube
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What it is: How long it takes to select YouTube for launch, starting from HDMI 1 input, when YouTube is placed first on the list of apps or added as a shortcut. This does not include app launch time, and does not use a fixed YouTube button on a remote. This serves as an indication of the time needed to select any app.
When it matters: When launching any app.
:
2 s
Time Taken to Change Backlight
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What it is: The time it takes to navigate to the 'Backlight' setting ('Brightness' on Sony TVs). This serves as an indication of how long it takes to navigate to basic TV settings.
When it matters: When changing TV settings.
:
10 s
Advanced Options
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What it is: Whether advanced options and settings are available, such as color calibration.
When it matters: When customizing the TV and using the smart features.
:
Many

The webOS interface is very similar to last year's model, with the inclusion of the improved search functionality. The menu is very fast and responsive, although the less powerful α7 processor in the SK9000 means slightly more lag than the C8 with its more powerful α9.

10 Ad-Free
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What it is: Whether or not ads can be found on the TV's smart platform.
When it matters: When using the smart features.
Score components:
Ads
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What it is: Whether the TV's main interface has ads. This does take into account ads in third-party apps.
When it matters: When using the smart features.
:
No
Opt-out
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What it is: Whether you can opt out of the ad services or not. A TV only passes this test if it allows you to remove them completely, not only disable the personalized advertising.
When it matters: When using the smart features.
:
N/A
Suggested Content in Home
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What it is: Whether suggested content appears in the TV's home menu or main menu. Suggested content can include recommended movies, TV shows, YouTube videos etc.
:
Yes
Opt-out of Suggested Content
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What it is: Whether the suggested content feed in the home menu can be removed or hidden
:
No

There were no ads displayed during our testing of the SK9000, but like the C8, the menu still mentions advertising cookies so the TV may have ads at some point or in some regions.

If anyone notices any ads in their SK9000, let us know and we'll update the review.

8.0 Apps and Features
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What it is: The usability, features and performance of apps and other smart features.
When it matters: Only when using smart features such as apps, casting and USB playback.
Score components: Subjectively assigned
LG SK9000 Apps Picture
App Selection
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What it is: The number and variety of apps available to download for the smart platform.
When it matters: When downloading new apps.
:
Many
App Smoothness
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What it is: How smooth it feels to navigate the interfaces of apps, affected by lag and frame drops.
When it matters: When using apps.
:
Average
Cast Capable
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What it is: Whether apps on a phone or tablet can cast content to the TV.
:
Yes
USB Drive Playback
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What it is: Whether the TV can play content from a drive connected to one of the TV's USB ports.
:
Yes
USB Drive HDR Playback
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What it is: Whether HDR files played from a USB drive can be displayed properly.
:
Yes
HDR in Netflix
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What it is: Whether HDR content on Netflix can be played back in HDR using the native Netflix app.
:
Yes
HDR in Amazon Video
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What it is: Whether HDR content on Amazon Video can be played in HDR using the native Amazon Video app.
:
Yes
HDR in YouTube
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What it is: Whether HDR content on YouTube can be played in HDR using the native YouTube app.
:
Yes

The SK9000 comes with most of the popular apps preloaded, including Netflix, Amazon Video, Hulu and YouTube.

9.0 Remote
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What it is: The usability and features of the TV's physical remote.
Score components: Subjectively assigned
LG SK9000 Remote Picture
Size
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What it is: How big the remote is
:
Large
Voice Control
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What it is: The capabilities of the TV's voice control feature
:
Many Features
CEC Menu Control
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What it is: Whether the remote can act as a universal remote for HDMI CEC enabled devices. This was tested on our Samsung UBD-K8500 4K Blu-ray player, and may not be valid for other CEC devices as implementations vary by manufacturer.
:
Yes
Other Smart Features
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What it is: Whether the remote has any other smart features, such as a pointer, universal remote support for non HDMI CEC devices, etc.
:
Yes

The remote is identical to the one found in this year's OLED C8. It provides quick access to most common functions. When pointed at the screen the remote functions as a pointer, making navigating the menus or entering text a breeze.

The remote also provides quick access to the powerful ThinQ AI voice search/smart assistant. The voice control feature allows you to perform searches across all of the installed video providers, control almost TV functions (including setting a sleep timer). The TV can even interact with other ThinQ compatible devices, including dishwashers, laundry machines, ovens, etc... It will also be able to interact with Google Home and Amazon Alexa compatible devices.

7.0 Remote App
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What it is: The features of the official phone and tablet app for the TV.
Score components: Subjectively assigned
LG SK9000 Remote App Picture
Acts as the Remote
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What it is: Whether the remote app can emulate all the buttons of the physical remote.
:
Yes
Launches Apps and Inputs
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What it is: Whether the remote app can launch the TV's apps and change between its inputs.
:
Both
Inputs Text in YouTube
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What it is: Whether the remote app can enter text for YouTube searches.
:
No
Inputs Text in Netflix
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What it is: Whether the remote app can enter text for Netflix searches.
:
No
Streams Device Files
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What it is: Whether the remote app can stream files from the phone or tablet to the TV, files such as pictures, music and video.
:
Yes
Controls TV Settings
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What it is: Whether the app can change all or some of the settings on the TV, such as the backlight.
:
No
Voice Control
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What it is: Whether the remote can send voice commands to the TV.
:
No

The LG TV Plus app offers quick access to most TV features and controls, and also has the ability to stream multimedia from your phone directly to the TV. Like Sony's remote offering, it does not work for text entry.

TV Controls
LG SK9000 Controls Picture

There is a single rocker joystick under the TV in the middle of the screen which provides quick access to most functions of the TV. It can power the TV, change inputs, change volume and channels. Very similar to other LG TVs including the UJ6300.

In The Box
LG SK9000 In The Box Picture

  • Manual
  • Cable Management Tie
  • Remote
  • Batteries
  • Composite Adapter
  • 61" Power cable(not shown)

Misc
Power Consumption : 46 W
Power Consumption (Max) : 123 W
Firmware : 03.00.62

Differences between Sizes and Variants

We tested the 55" SK9000 (55SK9000PUA). In the U.S. the SK8500 has been renamed to the SK9000, but in other regions it is still known as the SK8500. We expect our results to be valid for both model numbers, and for the 49" model that is not available in the U.S.

If someone comes across a different type of panel or their LG SK9000 doesn't correspond to our review, let us know and we will update the review.

Size US Model EU Model
49" N/A 49SK8500PLA
55" 55SK9000PUA 55SK8500PLA
65" 65SK9000PUA 65SK8500PLA

Compared to other TVs

LG SK9000 Group Shot Picture
Top left: LG  C8 (OLED55C8PUA). Bottom left: Samsung Q8C (QN55Q8C). Middle: LG SK9000 (55SK9000PUA). Top right: LG SJ9500 (65SJ9500). Bottom right: Sony X900F (XBR55X900F).  Unlike our other photographs, this picture wasn't taken under a controlled environment, so do not draw conclusions from it.

The LG SK9000 offers good performance for most viewing habits but is especially suited for bright rooms. 

LG SJ8500
55" 65"

The SJ8500 is the predecessor to the SK9000. They have a very similar design and offer similar performance. The SK9000 adds a full array backlight and is much brighter, so it is better suited for a bright room. It also adds a black frame insertion feature, which is great for gamers. The SK9000 is a significant upgrade over the SJ8500, but until the price comes down, the SJ8500 is a better buy.

Samsung MU8000
49" 55" 65" 75" 82"

Samsung's 2017 MU8000 is a good mid-range TV. It has better native contrast than the SK9000, but is not as bright and has a worse viewing angle. It has very similar motion handling and slightly worse input lag but is still responsive enough for most gamers. If you can still find the MU8000 and don't need a large viewing angle, it is the better buy.

Sony X900F
49" 55" 65" 75" 85"

The X900F is a mid-range 2018 Sony LED with very good picture quality. It has a much higher native contrast ratio than the SK9000 and is much brighter, making it a versatile alternative for bright and dark rooms. It has a worse viewing angle, so wide seating won't full appreciate the TV. It has better motion handling but slightly higher input lag, it is still a great choice for gamers. The X900F is definitely worth the upgrade over the SK9000.

LG C7
55" 65"

The OLED LG C7 is one of the top-line OLED TVs from 2017. It offers exceptional picture quality with infinite blacks, and an excellent picture quality. It handles motion better than the SK9000 and has similar input lag. It does come with the risk of burn-in and temporary image retention, but overall is an excellent TV. The LG B7 or C7 are both excellent choices if you can expand your budget a bit over the SK9000.

Conclusion
SEE PRICE
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7.9Mixed Usage
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What it is General purpose. The TV will be used for a variety of content and usages. Movies at night, TV shows during the day, video games from time to time, etc.
Score components:
Very good TV for a wide range of usages. The TV is best suited for bright rooms with wide seating, as it can get bright to combat glare and has great reflection handling. Image remains accurate when viewed at an angle which is great. Picture quality in a dark room is sub-par as the full-array local dimming isn't enough to make up for the low native contrast ratio. Input lag is very low and motion handling is good, so the TV feels responsive for gaming or PC use.
7.2Movies
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What it is Movies in the dark. The TV will be used for watching movies in a controlled environment, directly in front, in a home theater way. Mostly only high quality content, like Blu-rays, UHD Blu-rays, streaming and a little bit of HDR.
Score components:
Decent for watching movies in a dark room. Full-array local dimming helps to alleviate the poor native contrast ratio but blacks still appear gray or details are crushed in dark scenes. The TV can display 24p movies from most sources without judder which is great.
8.2TV Shows
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What it is TV Shows in a bright living room. The TV will be used in to watch TV shows, in a bright room during the day, from multiple viewing positions at different angles. The content watched has an average quality: cable, streaming, SD channels, etc.
Score components:
Great for watching TV shows in a bright room. The LG SK9000 can get bright in SDR to combat glare, and reflection handling is great. Image also remains accurate when viewed from an angle, which is good for those with wide seating. The smart platform works well for casual browsing or finding content on Netflix and YouTube.
8.0Sports
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What it is Sports in a living room. The TV will be used to watch sports during the day, like football or hockey. Usually watched with a group, so from multiple viewing position.
Great for watching sports in a bright room. Image remains accurate when viewed at an angle which is great for gatherings for an important game. The response time is fast, which is great for displaying fast motion without much of a trail. The screen can get bright to overcome glare, and anti-reflective coating works great.
8.5Video Games
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What it is Video games. The TV will be used to play video games, directly in front, in a controlled light environment. Usually fast games, like online FPS, where motion blur and input lag is important.
Great for gamers. Input lag is very low, so games feel responsive. The response time is excellent, resulting in only a short blur trail behind fast-paced content. The LG SK9000 can also flicker the image to clear up fast motion, and the picture quality is good in a room with some light.
7.2HDR Movies
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What it is HDR Movies and TV shows. The TV will be used to watch 4k UHD HDR content, with a wide color gamut and a high peak brightness. Either via UHD Blu-rays or HDR streaming.
Decent choice for watching HDR movies in a dark room. Contrast ratio is low so blacks appear gray, even with full-array local dimming. The TV can produce bright and saturated highlights. It supports both HDR10 and Dolby Vision.
7.9HDR Gaming
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What it is HDR Gaming. The TV will be used to play HDR video games using consoles that support it or on current generation gaming PCs. Xbox One S, PS4 Pro, GTX 10 series and AMD RX series graphics cards.
Great for HDR gaming. Picture quality is good, but low contrast ratio results in dark scenes that appear gray or washed out in a dark room. Input lag is low and response time is excellent so the TV feels very responsive even in fast action sequences. The TV can produce bright and saturated highlights in HDR.
8.4PC Monitor
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What it is PC Monitor. The TV will be used as a PC monitor, from 2-3 feet away, either for productivity purposes or gaming. Sharp text is important, as well as a high resolution.
Score components:
Great for use as a monitor. The colors remain accurate at an angle, which is great for viewing the sides of the screen from up close. Supports chroma 4:4:4 for clear text across all backgrounds. Input lag and fast response time are low, so the TV feels responsive and movement is clear.
Questions Found an error?

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Questions & Answers

2 ANSWERED QUESTIONS
0
Hello. y'all are slipping. the picture with the review screen in the middle of competing screens is not labeled. usually it says left to right bla bla bla don't see that in the last two reviews.

Thank you for pointing it out!
It should be fine now!

Please let us know if you see any other inconsistencies.

0
What's the difference between the LG SK8000 and the SK9000 besides the edgelit display on the 8000?
The biggest difference is the Full Array Local Dimming on the SK9000, as well as an added subwoofer (2.2 sound on the SK9000 v. 2.0 on the SK8000). We haven't reviewed the SK8000 yet so there may be other differences in the panels that we won't know about until we review it in the coming months.
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