TCL

TCL 55S551G 55-Inch 4K Google Smart TV (2024)

5.0 (3 reviews)
4K1080pHDRHDR10

Brilliant 4K Google TV with Dolby Vision, Dolby Atmos, and AI-powered picture optimization at an accessible price.

$329.94*
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*Price sourced from Amazon.com. Last updated:Jun 28, 2026.Price and availability are subject to change.

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Overview

The TCL 55S551G is a 55-inch 4K UHD smart television built on the Google TV platform, combining broad format support with AI-enhanced picture processing. At its core is the TCL AIPQ Processor with Deep Learning AI, which continuously analyzes on-screen content and adjusts color accuracy, contrast depth, and sharpness in real time. The result is a picture that adapts to whatever you are watching—whether it is a dimly lit thriller, a vivid nature documentary, or a fast-paced esports stream. HDR PRO+ support spans Dolby Vision, HDR10+, HDR10, and HLG, ensuring that content from every major streaming service and broadcast standard is rendered in its intended dynamic range.

For gamers, the TV offers Game Accelerator 120 with variable refresh rate support up to 120Hz, paired with Auto Game Mode that automatically switches to the lowest-latency settings when a console is detected. On the audio side, Dolby Atmos and DTS Virtual:X processing create a wider, more immersive soundstage from the built-in speakers, while Enhanced Dialogue Mode improves vocal clarity for everyday viewing. Bluetooth Personal Audio adds the convenience of wireless headphone pairing directly to the TV, and the Google TV interface brings together streaming apps, live TV, and voice search through the built-in Google Assistant. It is a feature-rich package that makes advanced display and audio technology accessible at a mainstream price point.

Key Features

4K UltraHD Resolution - Experience incredible detail with 4X the resolution of 1080p Full HDTVs.

High Brightness LED Backlight - Enjoy a brilliant picture in any room.

TCL AIPQ Processor with Deep Learning AI - Powerful, advanced processor intelligently optimizes the color, contrast, and clarity for an unrivaled 4K HDR experience.

Game Accelerator 120 - With up to fast 120 VRR, enjoy more responsive gameplay without lag, designed to keep you at the top of any leaderboard.

HDR PRO+ with Dolby Vision, HDR10+, HDR10, & HLG - Enjoy enhanced contrast, accurate colors and fine details utilizing all the most advanced HDR formats.

Auto Game Mode (ALLM) - Automatically enables game mode for the lowest possible input lag and latency for an unmatched gaming performance.

Dolby Atmos Audio - Advanced spatial audio processing found in movies, TV shows, and video games.

Enhanced Dialogue Mode - Audio Setting for better clarity and intelligibility in movies, TV shows, and video games.

DTS Virtual:X - Advanced audio post-processing for your everyday content offering an immersive 3D sound, all from just your TV speakers.

Bluetooth Personal Audio - Pair your favorite Bluetooth headphones to the TV for a private listening experience.

Specifications

Brand
TCL
Model
55S551G
Screen Size
55 inches
Resolution
4K Ultra HD
Backlight Type
High Brightness LED
Processor
TCL AIPQ Processor with Deep Learning AI
Motion Rate
240 with MEMC
HDR Support
HDR PRO+ (Dolby Vision, HDR10+, HDR10, HLG)
Gaming
Game Accelerator 120 VRR, Auto Game Mode (ALLM)
Audio
Dolby Atmos, DTS Virtual:X, Enhanced Dialogue Mode
Smart Platform
Google TV with Google Assistant
Connectivity
Bluetooth Personal Audio

Pros & Cons

👍 Pros

  • Supports all major HDR formats including Dolby Vision and HDR10+, so content always plays in its best available quality.
  • TCL AIPQ Processor with deep learning AI actively optimizes color, contrast, and clarity scene by scene.
  • Game Accelerator 120 with VRR and Auto Game Mode delivers responsive, low-lag performance for console gaming.
  • Google TV platform provides a unified content discovery interface and built-in Google Assistant.
  • Bluetooth Personal Audio lets you watch privately without a separate transmitter or adapter.

👎 Cons

  • LED backlight without local dimming zones limits the contrast and black levels compared to mini-LED or OLED panels.
  • Built-in TV speakers, while enhanced by Dolby Atmos processing, lack the bass response and separation of a dedicated sound system.
  • The bezel-less design offers minimal physical protection for the panel edges during handling or mounting.
  • Motion Rate 240 is a marketing figure—the native panel refresh rate is lower, supplemented by motion processing.

Frequently Asked Questions

It runs Google TV, giving you access to the Google Play Store, built-in Google Assistant voice control, and seamless Chromecast functionality.
Yes, it includes Game Accelerator 120 with variable refresh rate up to 120Hz and Auto Game Mode (ALLM) for low-latency gameplay.
It supports Dolby Vision, HDR10+, HDR10, and HLG—covering virtually every major HDR format available in streaming and broadcast content.
Yes, the TV supports Bluetooth Personal Audio, allowing you to pair wireless headphones directly to the TV.
It features Dolby Atmos spatial audio processing and DTS Virtual:X, along with an Enhanced Dialogue Mode for clearer speech in movies and shows.