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LG 55SK8000 55-Inch 4K Ultra HD Smart LED TV — main product image
LG 55SK8000 55-Inch 4K Ultra HD Smart LED TV
LG 55SK8000 55-Inch 4K Ultra HD Smart LED TV
LG 55SK8000 55-Inch 4K Ultra HD Smart LED TV
LG

LG 55SK8000 55-Inch 4K Ultra HD Smart LED TV

★★★★★4.3 (496 reviews)
4KUHD3840 x 2160HDRHDR10

LG 55-inch 4K SUPER UHD smart TV with Nano Cell display, AI ThinQ, and Dolby Atmos for cinematic home entertainment.

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Overview

The LG 55SK8000 is a 55-inch 4K SUPER UHD smart TV from LG's 2018 lineup, built around Nano Cell Display technology. Nano Cell filtering produces more accurate and consistent colors across wider viewing angles than conventional LED TVs, making it a strong choice for rooms where not everyone sits directly in front of the screen. The α7 (Alpha7) Intelligent Processor drives the picture quality, applying noise reduction, color mapping, and depth enhancement in real time. HDR content benefits from 4K Cinema HDR support spanning Dolby Vision, HDR10, and HLG — covering streaming services, Ultra HD Blu-ray, and live broadcast HDR standards.

On the audio side, the 55SK8000 supports Dolby Atmos decoding, adding a sense of height and spatial dimension to compatible content through the built-in speakers. The AI ThinQ smart platform includes Google Assistant natively and works with Amazon Alexa devices for voice-driven control of the TV and connected smart home products. Four HDMI ports, three USB ports, Ethernet, optical audio out, and Bluetooth 4.2 provide flexible connectivity for external devices. The slim profile measures just 2.5 inches deep without the stand, though the stand itself extends the total depth to 9.8 inches. At 48.7 inches wide, it fits comfortably in most living room or home theater setups.

Key Features

LG SUPER UHD TV with AI (Artificial Intelligence) ThinQ has the Google Assistant built in, so you can control compatible smart home devices using just your voice through the LG Magic Remote. Create a center for your smart home and beyond. Plus it works with Amazon Alexa devices (sold separately)

α7 Intelligent Processor enhances 4K HDR content for a truly cinematic experience. Enjoy a more lifelike picture with superior depth, sharpness, and remarkably accurate color

Local dimming can brighten and dim independently, enhancing contrast and achieving deeper black levels for a rich, lifelike image

4K Cinema HDR on LG SUPER UHD TV with AI ThinQ features comprehensive support of major high dynamic range formats including Dolby Vision, as well as HDR10 and HLG, both with LG’s advanced tone-mapping technology that provides scene-by-scene optimization

Dolby Atmos is the same audio technology developed for state-of-the-art cinemas, with immersive sound that appears to come from everywhere, putting you in the middle of all the excitement.Bluetooth version 4.2

Nano Cell Display has an expanded color gamut to deliver truer colors. It also absorbs unwanted light and reduces reflectivity to assure deeper black levels, even at a wider viewing angle

Inputs: 4 HDMI, 3 USB, 1 RF, 1 Composite in, 1 Ethernet, 1 Optical, 1 RS232C (Mini Jack) and Audio Return Channel Support via HDMI

Display Resolution 3840 x 2160. Dimensions (Wx H x D): TV without stand 48.7" x 28.4" x 2.5", TV with stand: 48.7" x 31.3" x 9.8".Diagonal Size:54.6 inches

Specifications

Display Size
55-Inch (54.6 inches diagonal)
Resolution
3840 x 2160
Display Technology
Nano Cell Display
Processor
α7 (Alpha7) Intelligent Processor
Smart TV Platform
AI ThinQ with Google Assistant (Alexa compatible)
HDR
4K Cinema HDR (Dolby Vision, HDR10, HLG)
Audio
Dolby Atmos
Bluetooth
4.2
Inputs
4 HDMI, 3 USB, 1 RF, 1 Composite, 1 Ethernet, 1 Optical, 1 RS232C (Mini Jack)
Dimensions (Without Stand)
48.7" x 28.4" x 2.5"
Dimensions (With Stand)
48.7" x 31.3" x 9.8"

Pros & Cons

👍 Pros

  • Nano Cell Display delivers accurate colors with wide viewing angles suitable for larger rooms
  • Comprehensive HDR support with Dolby Vision, HDR10, and HLG covers all major content formats
  • AI ThinQ with built-in Google Assistant enables voice control and smart home integration
  • Dolby Atmos audio provides immersive sound without requiring an external soundbar
  • α7 Intelligent Processor optimizes picture and sound quality based on content type

👎 Cons

  • Edge-lit LED backlighting produces less precise local dimming compared to full-array or OLED alternatives
  • 2018 model may no longer receive LG webOS app updates or new streaming app support
  • Bluetooth 4.2 is an older version with limitations compared to newer Bluetooth 5.0+ TVs
  • Stand footprint requires 9.8 inches of depth, which may not fit on shallower TV furniture
  • Peak brightness of this model may not fully showcase Dolby Vision HDR in bright rooms

Frequently Asked Questions

Nano Cell uses particles approximately 1 nanometer in size to filter out dull colors and enhance purity, resulting in more accurate and vibrant colors at wider viewing angles compared to standard LED panels.
Yes, it has Google Assistant built in and is also compatible with Amazon Alexa devices (sold separately), allowing voice control of the TV and connected smart home devices.
It supports 4K Cinema HDR with Dolby Vision, HDR10, and HLG, covering the major HDR standards for streaming services, Blu-ray, and broadcast content.
It has 4 HDMI ports, providing enough connections for a soundbar, game console, streaming device, and Blu-ray player simultaneously.
Yes, it has Bluetooth 4.2, which can be used to connect wireless headphones, keyboards, or other Bluetooth-enabled accessories.

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