TCL 55A400 PRO-UK 55 Inch NXTVISION A400 Pro 4K UHD HDR QD-MINI LED AI Art TV 2026

TCL 55A400 PRO-UK 55 Inch NXTVISION QD-Mini LED Art TV

Masterpiece Design. Masterful Performance.

The TCL 55A400 PRO-UK is designed for more than simply watching television. Combining a sophisticated frame-inspired design with QD-Mini LED 4K picture technology, a glare-reducing matte display and an extensive collection of digital artwork, it can become part of your room even when you're not watching a film or programme.

The 55-inch A400 PRO features a remarkably slim 39.9mm profile, a one-piece light-walnut woodgrain bezel and a screen designed to sit neatly against the wall. Behind its gallery-style appearance is a high-performance display with 4K UHD resolution, Quantum Dot colour, Mini LED local dimming, a native 144Hz refresh rate and TCL's TSR AiPQ Processor.

Add Google TV, Dolby Vision IQ, Dolby Atmos, an Onkyo 2.0 Hi-Fi sound system, AirPlay 2 and a range of art and lifestyle features, and the A400 PRO offers a distinctive alternative to a conventional 55-inch television.

Frame-Inspired Design

The A400 PRO has been created to resemble a framed piece of artwork rather than a traditional TV. Its ultra-slim 39.9mm chassis gives the 55-inch model a clean, low-profile appearance, particularly when wall mounted.

A single integrated bezel removes the need for separate decorative frame kits. The light-walnut woodgrain finish adds warmth to the design and works naturally with a wide range of interiors.

The result is a television that can blend into a living room, bedroom or other space without dominating the room when it is switched off.

Seamless Wall Mounting

With its slim, one-piece construction, the TCL A400 PRO can be positioned close to the wall using a compatible ultra-slim wall mount. This creates a more flush, picture-frame effect while keeping the installation relatively straightforward compared with solutions that require a separate external enclosure.

The actual distance from the wall will depend on the mounting system, wall and installation conditions.

Matte Screen for a More Natural Art Display

The matte HVA screen is one of the A400 PRO's key design features. Rather than relying on a conventional glossy TV surface, the display uses an anti-glare coating to reduce the impact of reflections.

This is particularly useful when displaying artwork or photographs, helping the screen maintain a more canvas-like appearance in rooms with windows, lamps or other sources of ambient light.

An integrated ambient light sensor can also detect changes in room lighting and adjust the screen brightness accordingly, helping images remain comfortable and natural throughout the day.

QD-Mini LED Picture Quality

At the heart of the A400 PRO is TCL's QD-Mini LED display technology, combining Mini LED backlighting with Quantum Dot colour reproduction.

Mini LED gives the television much finer control over its backlight than a conventional edge-lit LED display, while Quantum Dot technology helps produce a broader range of vivid yet natural-looking colours.

Together, these technologies deliver:

• Bright, detailed highlights
• Deeper-looking blacks
• Stronger contrast
• Richer colour reproduction
• Greater detail in HDR scenes
• More controlled backlighting
• A wide colour range for films, photography and artwork

Precise Dimming with up to 112 Zones

The 55-inch A400 PRO uses TCL's Precise Dimming system with up to 112 independently controlled Mini LED zones.

By controlling different areas of the backlight separately, the TV can adjust brightness more accurately across the picture. This helps reveal darker details while maintaining brighter highlights and reducing unwanted light spill around high-contrast objects.

The result is a more convincing sense of depth when watching HDR films, dark scenes and other demanding content.

Dimming zones by screen size: 55-inch – 112 zones; 65-inch – 180 zones; 75-inch – 240 zones; 85-inch – 264 zones; 98-inch – 448 zones.

QLED Quantum Dot Colour

The A400 PRO's Quantum Dot technology uses nanoscale particles to enhance colour reproduction. This helps the television produce bright, saturated colours while retaining a more natural appearance.

From the colours in a landscape to the subtle shades in a portrait or the vibrant imagery of a modern film, the QLED display is designed to keep images rich and lifelike.

TSR AiPQ Processor

TCL's TSR AiPQ Processor works behind the scenes to optimise the picture.

It analyses content and adjusts key aspects of the image, including contrast, colour, clarity and motion. This AI-based processing is designed to make different types of content look more balanced and detailed without requiring constant manual adjustment.

Whether you're watching streamed content, broadcast TV, films or sport, the processor helps the A400 PRO adapt its picture performance to what is on screen.

Native 144Hz Refresh Rate

The 144Hz native refresh rate gives the A400 PRO an advantage when displaying fast-moving content.

Rapid camera movements, sporting action and fast-paced films can appear smoother, while compatible gaming content benefits from the panel's high refresh capability.

It makes the A400 PRO more versatile than an art-focused television that concentrates purely on appearance.

4K UHD HDR Entertainment

When the A400 PRO switches from Art Display to TV mode, its 4K UHD display provides four times the resolution of Full HD for sharper images and finer detail.

HDR compatibility helps compatible content make better use of the panel's brightness and contrast capabilities, while Dolby Vision IQ can optimise Dolby Vision content according to the viewing environment.

This makes the A400 PRO equally suited to displaying artwork and settling down for a film or TV series.

Dolby Vision IQ

Dolby Vision IQ takes HDR viewing a step further by considering the ambient light in your room as well as the Dolby Vision content itself.

This helps preserve visible detail and maintain a balanced HDR presentation when viewing conditions change throughout the day.

A Digital Art Gallery at Home

One of the most distinctive aspects of the A400 PRO is its ability to function as a digital art display.

Through the T-Exhibition app, the TV provides access to a curated selection of artwork that can be displayed when you're not watching television. The included collection features different styles, including classic paintings, impressionist works, contemporary art, abstract designs, decorative pieces and expressive ink artwork.

The included selection does not require a paid subscription, although internet access, TCL account requirements, regional availability and licensing restrictions may apply.

Bring Classic Artwork to Life

The Art Display experience goes beyond simply showing a static image.

Selected artworks can be presented as moving scenes, creating subtle animation from traditional paintings. This gives the display a more dynamic feel and allows classic artwork to become part of the atmosphere of your room.

Availability of individual artworks can vary according to region and licensing.

AI Art with More Than 100,000 Designs

For something more personal, the A400 PRO provides access to more than 100,000 pre-generated AI artworks through its art features.

Choose from different themes and artistic styles to find artwork that matches your room or mood. The images are generated in advance using AI rather than being created live by the television.

This means you can change the appearance of your TV screen regularly without being limited to a small fixed selection of images.

Display Your Own Photos

The A400 PRO can also become a personal digital gallery.

Compatible photos from your phone can be uploaded and displayed on the TV, allowing you to create personalised photo walls, ambient scenes or digital clock displays.

Depending on the feature and region, the TV and mobile device may need to be connected to the same Wi-Fi network and the TCL Home app or compatible mobile software may be required.

Ambient Sound and Bluetooth Speaker Mode

The art experience isn't limited to visuals.

Compatible Art Display modes can be combined with ambient soundscapes, creating a calmer background atmosphere when you're relaxing at home.

The TV can also be used in Bluetooth speaker mode, allowing you to stream music while displaying artwork or other visual content. Compatible features may include on-screen lyrics, depending on the software and service being used.

Google TV Smart Entertainment

The TCL 55A400 PRO runs on Google TV, bringing your entertainment into a single, easy-to-navigate interface.

You can browse content and access compatible streaming applications without constantly switching between different inputs or menus. Recommendations can also help you find films and programmes based on the services and content you use.

Google Assistant is built in, allowing you to use voice commands for searches and supported smart-TV functions.

Voice Remote Control

Finding content is straightforward with the supplied voice remote. Instead of typing long searches using the on-screen keyboard, you can use your voice to search for films, programmes and other supported content.

AirPlay 2

With AirPlay 2 support, compatible Apple devices can wirelessly share content to the A400 PRO.

You can use the TV to display compatible photographs, videos and other content from supported iPhone, iPad or Mac devices, making it useful for both entertainment and sharing personal moments.

Onkyo 2.0 Hi-Fi Sound System

The picture is matched by a 2.0-channel Onkyo Hi-Fi audio system.

Side-firing speakers are designed to create a wider presentation than you might expect from such a slim television, helping dialogue remain clear while giving music, films and TV programmes a more spacious sound.

The integrated audio system means you can enjoy a better-balanced sound experience without immediately needing an external speaker system.

Dolby Atmos Sound

Support for Dolby Atmos adds a more immersive dimension to compatible soundtracks.

Instead of sound feeling confined to the television, compatible Dolby Atmos content can create a greater sense of space around the listener, making action films, concerts and other cinematic content more engaging.

For an even bigger home cinema presentation, the A400 PRO can also work with a compatible TCL soundbar.

Designed for Different Rooms

The A400 PRO is not restricted to one installation style.

It supports three main placement options:

• Wall mounting for a clean, gallery-style appearance
• Tabletop placement using the supplied stand
• Mobile floor stand using an optional accessory where available

This makes it easier to adapt the TV to different rooms and layouts.

Height-Adjustable Tabletop Stand

If you prefer not to wall mount the television, the height-adjustable stand provides additional flexibility.

Two height positions allow you to choose the most suitable viewing height and can provide additional clearance underneath the screen for a compatible soundbar or decorative items.

Stand design and available height positions can vary according to model and region.

Optional Mobile Floor Stand

For maximum flexibility, the A400 PRO can be paired with an optional mobile floor stand in supported regions.

The stand allows the television to be moved between rooms rather than remaining permanently positioned against one wall. 360-degree swivel wheels with brake control make it possible to reposition the TV and then secure it in place.

This can be particularly useful when the television is being used as both an entertainment screen and a digital art display.

Halo Thermal Design

Despite its slim profile, the A400 PRO has been designed with heat management in mind.

Its Halo thermal design uses high-thermal-conductivity materials and an optimised airflow path to help move heat away from important internal components, including when the TV is installed close to the wall.

This supports stable operation during extended use, although actual thermal performance will naturally depend on room temperature, installation and usage conditions.

A TV That Changes With Your Home

The TCL 55A400 PRO-UK is designed to move between different roles. During the evening it can become a 55-inch 4K HDR television for films, sport and gaming; during the day it can display artwork, family photographs or calming ambient scenes.

Its combination of QD-Mini LED picture quality, matte anti-glare technology, 144Hz refresh rate, Google TV, Onkyo audio and gallery-inspired styling makes it a particularly versatile choice for anyone who wants their television to look as good when switched off as it does when switched on.

What's Included

The exact contents can vary according to region and production batch. Depending on the shipment, the box may include a tabletop stand and, on later production batches, an ultra-slim wall mount.

Please check the packaging and supplied accessories at the time of purchase for the contents specific to your unit.

Please note: The optional mobile floor stand is sold separately and availability may vary by region. Artworks and selected smart features may require an internet connection and TCL account. Content, applications and artwork collections are subject to regional availability, licensing and software updates.

Why Buy the TCL 55A400 PRO-UK?

The TCL 55A400 PRO-UK 55 Inch NXTVISION QD-Mini LED Art TV is aimed at buyers who want more from a television than conventional picture performance. Its QD-Mini LED backlight, 112-zone local dimming, Quantum Dot colour, matte HVA panel and 144Hz refresh rate provide a strong foundation for movies, sport and gaming, while Dolby Vision IQ and Dolby Atmos enhance compatible content.

At the same time, its slim-framed design, integrated artwork collection, AI Art, personal photo display and flexible mounting options allow it to work as part of your interior when you're not watching TV.

Technical Specifications

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