RATED
Great
8.4/10
54.6″ TCL 55A400U – Full Specifications
The 55A400U from TCL is a 54.6-inch 4K Mini LED Google TV with a 144 Hz HVA panel and more published picture data than many rivals.
tcl●TV
Display
54.6 in, HVA, Mini LED, 3840 x 2160 pixels
54.6
Refresh rate
48 Hz - 144 Hz
48 Hz
Dimensions
1228 x 710 x 39.9 mm
1228
Weight
13.4 kg
13.4 k
Processor
MediaTek 9655+
9655
Overview
The 55A400U from TCL is a 54.6-inch 4K Mini LED Google TV with a 144 Hz HVA panel and more published picture data than many rivals. Typical brightness is listed at 650 cd/m², native contrast at 6000:1 and DCI-P3 coverage at 93%, supporting Dolby Vision IQ, HDR10+ Gaming and HLG with credible hardware figures. Two HDMI 2.1 ports provide VRR, ALLM and FreeSync Premium Pro, while Google TV runs on a TSR AiPQ processor, MediaTek 9655+ chipset and 4 GB RAM. Its 20 W Onkyo-branded audio is adequate for normal programmes but light for films, and peak brightness remains unpublished. The fixed stand has no swivel or height adjustment. Buy it if you want a bright 55-inch Mini LED TV with 144 Hz gaming and strong HDR compatibility; skip it if sound quality or adjustable placement matters most.
BrandTCLPanel TypeHVAResolution3840 x 2160 (4K)Refresh Rate48 Hz - 144 Hz
Key Highlights
- Mini LED backlighting gives 55A400U stronger dimming potential than a basic edge-lit or Direct LED TV
- 93 % (percent) DCI-P3 coverage supports wider colour for films, sport and games
- Dolby Vision IQ, HDR10+ Gaming, HLG support covers the important HDR formats listed for this model
- 48 Hz - 144 Hz with VRR, ALLM and adaptive sync suits modern console and PC gaming
- Google TV with TSR AIPQ Processor provides streaming, casting and voice-assistant functions
Who Should Buy the tcl 55A400U
+ Best For
Everyday viewers
54.6-inch screen and 3840 x 2160 (4K) suit films, television and streaming
Console and PC gamers
48 Hz - 144 Hz and Variable Refresh Rate (VRR) match the panel’s gaming level
HDR format users
Dolby Vision IQ, HDR10+ Gaming, HLG offers broad source compatibility
Smart-TV households
Google TV handles apps, casting and connected-home features
× Not Ideal For
Brightness-focused HDR buyers
the sheet does not publish enough brightness data to judge highlight intensity
Flexible furniture setups
the included stand has no height, swivel or tilt adjustment
Buyers expecting cinema-scale sound
the listed or unpublished speaker output favours adding a soundbar
Display Performance
Refresh Rate
48 Hz - 144 Hz
Supports high-frame-rate gaming and smoother sport
Response Time
Not published
No measured pixel-response claim should be assumed when the sheet omits it
Brightness
650 cd/m² (candela per square meter)
A useful published baseline, though peak output is still not published
Contrast
6000 : 1
The listed native contrast supports stronger dark-scene separation
Colour Gamut
93 % (percent)
Wide colour coverage is useful for HDR films and games
HDR
Dolby Vision IQ, HDR10+ Gaming, HLG
Format support is broad, but hardware brightness and dimming decide the real result
Gaming Performance
Refresh Rate48 Hz - 144 HzUseful for high-frame-rate consoles and PCs
Response TimeNot publishedThe sheet does not provide a dependable motion-response figure
VRR / Adaptive SyncVariable Refresh Rate (VRR)Helps reduce tearing when frame rate changes
GPU Requirement4K up to 144 HzA powerful current GPU is needed to approach 4K at 144 Hz in demanding games
HDR & Brightness Reality
55A400U has Mini LED hardware and accepts Dolby Vision IQ, HDR10+ Gaming, HLG. The 650 cd/m² (candela per square meter) typical-brightness figure provides a useful baseline, but peak brightness is also missing. 6000 : 1 and 93 % (percent) complete the available picture data. Mini LED improves dimming potential, but the badge alone does not prove flagship HDR highlights or perfect blooming control.
Connectivity & Ports
HDMI2 x HDMI 2.0 + 2 x HDMI 2.1Includes high-bandwidth HDMI 2.1 inputs for gaming
DisplayPortNone listedThis television relies on HDMI rather than a PC-style DisplayPort input
USB-CNone listedLaptop video and charging over USB-C are not supported
USB Hub1 x USB 3.0Intended for media and accessories rather than a desktop docking setup
Audio OutHDMI eARC, opticalProvides a route to a soundbar, AV receiver or headphones where listed
Real-World Use Cases
Google TV and TSR AIPQ Processor provide apps, casting and smart-TV control
Dolby Vision IQ, HDR10+ Gaming, HLG covers the major listed HDR formats for discs and services
48 Hz - 144 Hz with Variable Refresh Rate (VRR) suits high-frame-rate console use
400 x 400 mm VESA support and 14.5 kg (kilograms) assembled weight determine the required bracket
Pros & Cons
Pros
- Mini LED backlighting gives better contrast-control potential than a basic LED system
- 93 % (percent) DCI-P3 coverage supports wider colour for HDR films and games
- Dolby Vision IQ, HDR10+ Gaming, HLG provides broad HDR source compatibility
- 48 Hz 144 Hz, VRR, ALLM and adaptive sync form a strong gaming specification
- 2 x HDMI 2.0 + 2 x HDMI 2.1 plus HDMI eARC, optical covers the main entertainment connections
Cons
- Incomplete brightness data makes real HDR intensity harder to judge from the specifications
- Fixed stand has no height, swivel, pivot or tilt adjustment
- Built-in or unpublished audio output is unlikely to match the screen scale for films
Score & Ratings
8.4/10
Great
Television Identity & Market
13
| Specification | Value |
|---|---|
| Brand | TCL |
| Series | A400U |
| Model | 55A400U |
| Model Alias | 55" TCL A400U Premium Wallpaper QD-Mini LED TV |
| Full Product Name | TCL 55A400U |
| Model Year | 2026 |
| TV Category | Premium Design-Focused Tier |
| Market Position | Designer Series QD-Mini LED |
| Primary Use | Design-Conscious Premium Home Entertainment |
| Region / Variant | Not specified |
| Launch Status | 2026 model year |
| Available Colors | Black |
| Warranty | 1 year limited warranty |
Screen Geometry & Format
8
| Specification | Value |
|---|---|
| Screen Size | 54.6 in |
| Marketed Screen Size | 54.6 in |
| Exact Diagonal | 1388 mm / 138.8 cm / 54.6457 in / 4.5538 ft |
| Aspect Ratio | 16:9 |
| Active Display Width | 1209.6 mm / 120.96 cm / 47.622 in / 3.9685 ft |
| Active Display Height | 680.4 mm / 68.04 cm / 26.7874 in / 2.2323 ft |
| Screen-to-Body Ratio | 94.4 % |
| 3D Support | No |
Panel Architecture & Light Control
7
| Specification | Value | What It Means |
|---|---|---|
| Panel Manufacturer | CSOT | |
| Panel Type | HVA | HVA favours stronger native contrast than typical IPS television panels, with some off-axis colour shift possible. |
| Panel Technology | VA | |
| Quantum Dot | Yes | |
| Backlight Type | Mini LED | |
| Panel Bit Depth | 10 bits | 10 bits allows smoother colour gradation than a basic 8-bit-only pipeline, though source quality still matters. |
| Display Colors | 1.07 billion colors / 30-bit |
Surface Treatment & Viewing Layer
1
| Specification | Value |
|---|---|
| Screen Coating | Anti-glare/Matte |
Resolution, Scaling & Signal
4
| Specification | Value |
|---|---|
| Native Resolution | 3840 x 2160 pixelsUltra HD (UHD) / 4K / 2160p |
| Pixel Density | 80 ppi |
| Pixel Pitch | 0.315 mm |
| HDCP Support | Yes |
◑
Luminance, Blacks & Contrast
8
| Specification | Value |
|---|---|
| Typical Brightness | 650 cd/m² |
| Peak Brightness | 2500 cd/m² |
| Static Contrast | 6000 : 1 |
| Static Contrast Ratio | 6000 : 1 |
| Dynamic Contrast Ratio | 25000000 : 1 |
| Viewing Angles | 178 ° / 178 ° |
| Horizontal Viewing Angle | 178 ° |
| Vertical Viewing Angle | 178 ° |
Color Reproduction & Calibration
2
| Specification | Value | What It Means |
|---|---|---|
| DCI-P3 Coverage | 93 % | 93 % (percent) gives wide colour coverage for HDR films and games. |
| Wide Color Gamut | Yes |
HDR Formats & Tone Mapping
4
| Specification | Value | What It Means |
|---|---|---|
| HDR Support | Dolby Vision IQDolby VisionHDR10+ GamingHDR10+HDR10HLG |
Dolby Vision IQ, HDR10+ Gaming, HLG means the TV can accept these formats, but brightness and dimming still determine visible HDR quality. |
| HDR Formats | Dolby Vision IQDolby VisionHDR10+ GamingHDR10+HDR10HLG |
|
| IMAX Enhanced | Yes | |
| Filmmaker Mode | Yes |
Motion Processing & Response
4
| Specification | Value |
|---|---|
| Native Refresh Rate | 48 Hz - 144 Hz |
| Maximum Refresh Rate | 48 Hz - 144 Hz |
| Motion Processing | AI MotionMasterMotion Estimation Motion Compensation (MEMC) |
| Motion Estimation | Yes |
Console, VRR & Game Tools
5
| Specification | Value |
|---|---|
| Variable Refresh Rate | Variable Refresh Rate (VRR) |
| Auto Low Latency Mode | Auto Low Latency Mode (ALLM) |
| High Frame Rate | Yes |
| AMD FreeSync | AMD FreeSync Premium Pro |
| Game Bar | AI Gaming with Game Bar |
Picture Intelligence & AI
3
| Specification | Value |
|---|---|
| AI Upscaling | Yes |
| Filmmaker Mode | Yes |
| Ambient Mode | Yes |
Broadcast Tuners & Reception
10
| Specification | Value |
|---|---|
| Built-In TV Tuner | Yes |
| Tuner Configuration | Analog (NTSC/PAL/SECAM)DVB-TDVB-T2DVB-CDVB-SDVB-S2 |
| Analog Tuner | NTSC / PAL / SECAM |
| Digital Terrestrial Tuner | dvb-t |
| Digital Terrestrial Tuner 2 | dvb-t2 |
| Digital Cable Tuner | dvb-c |
| Digital Satellite Tuner | dvb-s |
| Digital Satellite Tuner 2 | dvb-s2 |
| Satellite Input | 1× F-type |
| Antenna RF Input | Yes |
Compute, Memory & Storage
7
| Specification | Value |
|---|---|
| Processor Brand Name | TSR AIPQ Processor |
| System on Chip | MediaTek 9655+ |
| SoC Model | MediaTek 9655+ |
| CPU Architecture | ARM Cortex-A73, 1800 MHz, Cores: 4 |
| CPU Cores | 4 |
| GPU | ARM Mali-G57 MC1 |
| RAM Capacity | 4 GB |
Smart Platform & System
2
| Specification | Value |
|---|---|
| Smart TV | Yes |
| Operating System | Google TV |
Streaming & Entertainment
1
| Specification | Value |
|---|---|
| Ambient Mode | Ambient Mode |
Voice Assistants & Search
1
| Specification | Value |
|---|---|
| Voice Control | Yes |
HDMI Signal Interface
10
| Specification | Value |
|---|---|
| Total HDMI Ports | 4 |
| HDMI 2.1 Ports | 2× HDMI 2.1 |
| HDMI 2.0 Ports | 2× HDMI 2.0 |
| HDMI CEC | Yes |
| Audio Return Channel | Yes |
| Enhanced Audio Return Channel | Yes |
| Auto Low Latency Mode | Auto Low Latency Mode (ALLM) |
| High Frame Rate | Yes |
| Variable Refresh Rate | Variable Refresh Rate (VRR) |
| HDCP Support | Yes |
USB, Audio & Legacy I/O
7
| Specification | Value |
|---|---|
| Total USB Ports | 1 |
| USB-A 3.0 Ports | 1× USB 3.0 |
| Ethernet Port | 1× RJ45 |
| Optical Audio Output | 1× S/PDIF |
| Satellite Input | 1× F-type |
| Antenna Input | 1× RF |
| Common Interface Slot | 1× CI+ |
Wireless, LAN & Casting
10
| Specification | Value |
|---|---|
| LAN | Yes |
| Wi-Fi | Wi-Fi 8 |
| Wi-Fi Standards | 802.11a |
| Bluetooth | Bluetooth 5.4 |
| Wi-Fi Direct | Yes |
| DLNA | Yes |
| Apple AirPlay | Yes |
| Google Cast | Yes |
| Miracast | Yes |
| Multi-View | Yes |
Speaker Layout & Output
5
| Specification | Value |
|---|---|
| Built-In Speakers | Yes |
| Speaker Configuration | 2.0 CH |
| Speaker Channels | 2.0 CH |
| Total Audio Output | 20W |
| Total Speaker Output | 20W |
Sound Formats & Enhancement
3
| Specification | Value |
|---|---|
| Dolby Atmos | Yes |
| Dolby Digital | Yes |
| Dolby Digital Plus | Yes |
Camera & Video Calling
1
| Specification | Value |
|---|---|
| Built-In Camera | No |
Panel-Only Size & Mass
5
| Specification | Value |
|---|---|
| Dimensions Without Stand | 1228 mm x 710 mm x 39.9 mm (W x H x D) |
| Width Without Stand | 1228 mm |
| Height Without Stand | 710 mm |
| Depth Without Stand | 39.9 mm |
| Weight Without Stand | 13.4 kg |
Assembled TV Size & Mass
5
| Specification | Value |
|---|---|
| Dimensions With Stand | 1228 mm x 762 mm x 295 mm (W x H x D) |
| Width With Stand | 1228 mm |
| Height With Stand | 762 mm |
| Depth With Stand | 295 mm |
| Weight With Stand | 14.5 kg |
Shipping Carton Measurements
5
| Specification | Value |
|---|---|
| Box Dimensions | 1360 mm x 875 mm x 122 mm (W x H x D) |
| Box Width | 1360 mm |
| Box Height | 875 mm |
| Box Depth | 122 mm |
| Box Weight | 19.3 kg / 42.55 lbs |
Exterior Styling & Stand Footprint
2
| Specification | Value |
|---|---|
| Stand Width | 276 mm / 27.6 cm / 10.8661 in / 0.9055 ft |
| Chassis Color | Black |
Wall Mounting & Installation
9
| Specification | Value |
|---|---|
| VESA Mount | 400 x 400 mm |
| VESA Interface | 400 x 400 mm |
| VESA Size | 400 x 400 mm |
| Removable Stand | Yes |
| Height Adjustment | NoLandscape/portrait pivot: NoLeft/right swivel: NoForward/backward tilt: No |
| Swivel Adjustment | NoForward/backward tilt: No |
| Tilt Adjustment | No |
| Pivot Adjustment | NoLeft/right swivel: NoForward/backward tilt: No |
| Portrait Mode | No |
Electrical Load & Efficiency
3
| Specification | Value |
|---|---|
| Power Input | 220 V - 240 V |
| AC Frequency | 50 Hz - 60 Hz |
| Standby Consumption | 0.5 W |
Environmental Operating Limits
4
| Specification | Value |
|---|---|
| Operating Temperature | 5 °C - 35 °C / 41 °F - 95 °F |
| Operating Humidity | 20 % - 80 % |
| Storage Temperature | -15 °C - 45 °C / 5 °F - 113 °F |
| Storage Humidity | 10 % - 90 % |
Picture Feature Inventory
2
| Specification | Value |
|---|---|
| Filmmaker Mode | Yes |
| IMAX Enhanced | Yes |
Gaming Validation & Compatibility
3
| Specification | Value |
|---|---|
| AMD FreeSync Certification | Yes |
| Game Bar | AI Gaming with Game Bar |
| ALLM | Auto Low Latency Mode (ALLM) |
Regulatory & Industry Approvals
3
| Specification | Value |
|---|---|
| CE | Yes |
| IMAX Enhanced | Yes |
| CI+ Certification | Yes (CI+ 1.4) |
In-the-Box Components
3
| Specification | Value |
|---|---|
| Remote Control | Voice remote control |
| Remote Voice Control | Yes |
| Screen Size | 54.6 in |
Frequently Asked Questions
01 What makes the TCL 55A400U different from a basic LED television? +
It uses a Mini LED backlight with a HVA panel and 3840 x 2160 (4K) resolution. The practical gain depends on the published brightness and contrast data, not the backlight name alone.
02 Which HDR formats are listed for the TCL 55A400U? +
The sheet includes Dolby Vision IQ, HDR10+ Gaming, HLG. Actual HDR impact still depends on brightness, contrast and local-dimming behaviour.
03 What gaming level suits the TCL 55A400U? +
Its panel reaches 48 Hz - 144 Hz and lists Variable Refresh Rate (VRR). A powerful current GPU is needed to approach 4K at 144 Hz in demanding games.
04 What is the main specification weakness of the TCL 55A400U? +
Peak brightness is not published, so HDR highlight capability remains uncertain. The fixed stand also gives little placement flexibility.
05 What should be checked before installing the TCL 55A400U? +
The TV weighs 14.5 kg (kilograms) with its stand and uses a 400 x 400 mm VESA pattern. Confirm cabinet width or wall-mount capacity before delivery.
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