Samsung QLED Q70D / Q74D / Q77D vs TCL A400 PRO

Direct comparison

Q70D / Q74D / Q77D

Info

Available screen sizes: 55”65”75”85”

Available screen sizes: 32”43”55”65”75”85”98”

Panel type: LCD VA

Resolution: 3840x2160

System: Tizen

Model year: 2024

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Panel type: LCD VA

Resolution: 3840x2160

System: Google TV

Model year: 2026

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Overall rating

6.8

7.1

  • Movies and series in UHD quality

    6.1

    6.6

  • Classic TV, YouTube

    6.0

    6.9

  • Sports broadcasts (TV and apps)

    6.5

    6.6

  • Gaming on console

    8.7

    8.4

  • TV as a computer monitor

    8.0

    8.9

  • Watching in bright light

    5.4

    5.7

  • Utility functions

    7.4

    7.4

  • Apps

    9.3

    9.6

  • Sound quality

    6.3

    6.6

Advantages

  • Excellent performance with consoles and computers

  • Colour reproduction after the calibration process

  • Very good performance in sports - advanced motion smoothing system

  • Smooth and trouble-free operation of the Tizen system

  • Very good tonal transition quality within this budget

  • Good blacks and contrast thanks to Mini-LED and a VA panel

  • Very good picture quality for a lifestyle TV

  • Rich colours thanks to the PFS/QLED filter

  • Supports Dolby Vision and HDR10+

  • Excellent factory colour tuning on the review unit

  • 144 Hz panel and very low input lag

  • Outstanding feature set for gamers

  • Excellent compatibility with PCs

  • Matte finish effectively reduces reflections

  • Google TV with a large selection of apps

  • Extensive digital art gallery

  • "Lifestyle" design

Disadvantages

No like
  • Possible noticeable light leaks

  • No Dolby Vision support

  • Slim mount not included

  • Bezels are fixed

  • Average digital image processing

  • Visible VA panel smearing

  • Average viewing angles

  • Only two full HDMI 2.1 ports

  • Sound is fairly flat

Note: No Mini-LED in the 32- and 43-inch versions

Our verdict

Samsung Q70D performed in the test exactly as it should for its price range – very competently. The strongest aspects of the television are certainly its performance when using a console and colour reproduction after the calibration process. The former will undoubtedly catch the attention of gamers with a range of conveniences that Samsung Q70D can offer, and there are quite a few, including that which is almost exclusive to the manufacturer's units – the ability to smooth out gameplay while still maintaining reasonable input lag, allowing titles running at 30 fps to perform like those at native 60 frames per second. In the context of gaming, one cannot forget the well-implemented HGIG mode, which, when set correctly, is on par with games using Dolby Vision. We must also acknowledge the easy pairing of the television with the Canal+ decoder, which is not such an obvious advantage, but we know that many people experience issues with this. Staying on the topic of television, it must be noted that the Samsung Q70D offers very good brightness in SDR content for its price range, making daytime viewing more than comfortable. A downside for the tested television is the lack of Dolby Vision, which would have significantly enhanced performance at the maximum brightness of the Samsung Q70D. The device's construction flaws should not be overlooked, as they may (though not necessarily) lead to light bleed that can be noticed in dark situations during dimly lit scenes. What cannot be taken away from the Samsung Q70D is the fact that it features one of the better motion smoothers in its price bracket, which works excellently for sports events or fast-paced action scenes. The system responsible for the television's operation runs very smoothly, and the only thing we can criticise it for is the absence of the Tidal app. In summary, the Samsung Q70D represents a good continuation of the manufacturer's seventh series, which year after year is gaining – firstly, in quality, and secondly, in popularity.

TCL A400 Pro is one of the most interesting lifestyle TVs we've tested so far. And not because it turns the whole idea of the "TV as a picture" upside down. In that respect it does roughly what the competition does: it should look good, blend into the interior and not be just another black slab in the living room. Its real strength lies elsewhere: in picture quality. This is the first TV of this kind that actually gives us an image built on solid blacks and high contrast. Full Mini-LED backlighting combined with a VA panel means the A400 Pro can show a depth that has simply been missing from lifestyle TVs until now. Of course it's not Mini-LED that you'd put shoulder to shoulder with the best LCDs on the market, but in its "picture" category the A400 Pro does something really important: it proves that an art TV doesn't have to mean a big compromise in picture quality. Importantly, it doesn't stop at blacks and contrast. The A400 Pro has very good colours, supports Dolby Vision and runs on Google TV, so in everyday use it is simply a convenient, full-featured TV for films, series and streaming. On top of that there are very strong gaming capabilities, so it easily finds a place with a console or PC. And I think it's this versatility that's its biggest surprise. It looks like a lifestyle TV, but it doesn't force you to give up the functions you expect from a regular TV.

The biggest reservations, paradoxically, are not about the picture itself. Sure, the number of local dimming zones could be greater and the upscaling doesn't stand out from the usual. But given the character of this model, what bothers us more are decisions connected with the concept of a picture on the wall. The lack of a slim mount in the box is a strange move, because that is exactly the type of installation that should be standard here. In addition, the wood-effect bezels are permanently attached, so they don't offer the same freedom of personalisation as on other models of this type. And because the casing is thicker, the A400 Pro doesn't always deliver as flat and subtle an effect as you might expect from a TV in this category.

And that's the biggest paradox of the TCL A400 Pro. In terms of image it may be one of the strongest lifestyle TVs on the market, but at the same time it loses a little where such a product should charm the most. Still, the balance is very positive. If the design decisions mentioned earlier don't bother you, the A400 Pro makes a lot of sense. It's a TV for people who want something nicer than a classic television but don't want to pay for looks with a major compromise in picture quality. That's why the TCL A400 Pro is one of the most interesting models in its category.

TV appearance

HDMI inputs
0 x HDMI 2.0, 4 x HDMI 2.1 (40Gbps)
2 x HDMI 2.0, 2 x HDMI 2.1 (48Gbps)
Other inputs
Outputs
Toslink (Optical audio), eARC (HDMI), ARC (HDMI)
Toslink (Optical audio), eARC (HDMI), ARC (HDMI)
Network Interfaces
Wi-Fi 2.4GHz, Wi-Fi 5GHz, Ethernet (LAN) 100Mbps
Wi-Fi 2.4GHz, Wi-Fi 5GHz, Ethernet (LAN) 100Mbps
Build quality
Premium
Good
Stand type
Central
Legs
Bezel color
Graphite
Changeable Frame
Stand
Fixed
Height adjustment, Base adjustment
Flat design
Yes
Yes
Accessories
Stand
Stand

Contrast and black detail

5.4/10

7.7/10

Local dimming function: No

Local dimming function: Yes, number of zones: 180 (10 x 18)

Contrast:

Review Samsung QLED Q70D / Q74D / Q77D Contrast and black detail

Result

2,450:1

Review Samsung QLED Q70D / Q74D / Q77D Contrast and black detail

Result

5,150:1

Review Samsung QLED Q70D / Q74D / Q77D Contrast and black detail

Result

6,550:1

Review Samsung QLED Q70D / Q74D / Q77D Contrast and black detail

Result

5,850:1

Review Samsung QLED Q70D / Q74D / Q77D Contrast and black detail

Result

2,800:1

Review TCL A400 PRO Contrast and black detail

Result

131,100:1

Review TCL A400 PRO Contrast and black detail

Result

33,750:1

Review TCL A400 PRO Contrast and black detail

Result

17,350:1

Review TCL A400 PRO Contrast and black detail

Result

15,000:1

Review TCL A400 PRO Contrast and black detail

Result

5,900:1

Halo effect and black detail visibility:

Check the visibility of bright lights on a dark background. Mini-LEDs often struggle with this. The photo does not compare black levels – that’s what the video below is for.

The video accurately shows differences in contrast and black levels between TVs, as well as potential issues: halo around bright objects or Mini-LED zone operation visible as brightness jumps.

Samsung Q70D and its related models, such as Q77D and Q74D, use a VA panel, which should inherently provide decent contrast. Typically, it is several times higher than that of IPS/ADS screens that do not come equipped with an advanced local dimming system. As you can see, contrast results are quite varied, which is caused by the unevenness of the panel. Therefore, we might sometimes get good contrast, and other times it can be significantly worsened, but generally, it remains fairly consistent, aside from light bleed. Let’s take a look at the film scenes we prepared from "Oblivion" and "Revenant." As we can see, in the first one, the lights are well separated, which is a positive phenomenon, as the visibility of details in bright areas in further tests should be equally good. What stands out the most here is the unusual oversharpening of the smoke visible under the light and the navy black in the background. In the frame from the second film, the first thing that stands out is the unevenness of the backlighting of our piece. This was significant and strongly affected the perceived image. Nonetheless, the details in the film were well visible.

Moving on to the image quality tests, it’s immediately clear that the biggest change compared with typical lifestyle TVs is what the TCL A400 Pro brings to blacks and contrast. This is all thanks to full-fledged Mini-LED backlighting placed directly behind the panel. That allows the TV to locally dim selected parts of the image and not be limited solely to the panel’s native contrast. In the 65-inch sample we tested, we counted 180 dimming zones. That’s not an impressive number compared with conventional Mini-LED TVs, where there can be many more zones, but for a lifestyle TV it’s already a very big step forward. Especially since competitors often either lack advanced local dimming or use much simpler edge-lit backlighting.

In practice this delivers very good results. In simpler scenes where bright elements are clearly separated from a dark background, the A400 Pro can effectively dim the black areas and show genuinely deep blacks. It’s one of those things that immediately sets it apart from many conventional "picture-first" TVs. Of course, that doesn’t mean TCL completely avoids the limitations of Mini-LED LCD technology. 180 zones is still relatively few, so in more complex scenes, for example with small bright elements on a dark background, a halo effect can appear. It also happens that blacks in those conditions take on a more navy-purple tint, because the TV cannot dim the background with the same precision as OLEDs. Despite these limitations, we think the A400 Pro brings a significant breath of fresh air to this category. For a lifestyle TV that’s primarily meant to look good on the wall, the black level and contrast are a very strong selling point.

NOTE. It’s worth noting that the number of local dimming zones depends on the screen diagonal. Larger variants should have more zones, but because the number of zones increases with panel size, we don’t expect major differences in black level and contrast between the Mini-LED versions. The exception is the 32- and 43-inch models, in which TCL did not apply local dimming. These are much simpler LCD designs, so our review does not directly apply to those diagonals, and the prices given in the review should be treated as indicative only.

Number of dimming zones in the TCL A400 Pro

Screen size

Backlight type

Number of local dimming zones

32"

PFS LED

None

43"

PFS LED

None

55"

QD Mini-LED

112 zones

65"

QD Mini-LED

180 zones

75"

QD Mini-LED

240 zones

85"

QD Mini-LED

264 zones

98"

QD Mini-LED

448 zones

HDR effect quality

5.5/10

4/10

Supported formats
HDR10, HDR10+, HLG
HDR10, HDR10+, Dolby Vision, Dolby Vision IQ, HLG
Color gamut coverage
DCI P3: 92.2%, Bt.2020: 68.7%
DCI P3: 94.3%, Bt.2020: 72.9%

Luminance measurements in HDR:

Review Samsung QLED Q70D / Q74D / Q77D Brightness measurement

Result

433 nit

Review Samsung QLED Q70D / Q74D / Q77D Brightness measurement

Result

461 nit

Review Samsung QLED Q70D / Q74D / Q77D Brightness measurement

Result

477 nit

Review Samsung QLED Q70D / Q74D / Q77D Brightness measurement

Result

475 nit

Review Samsung QLED Q70D / Q74D / Q77D Brightness measurement

Result

490 nit

Review TCL A400 PRO Brightness measurement

Result

439 nit

Review TCL A400 PRO Brightness measurement

Result

111 nit

Review TCL A400 PRO Brightness measurement

Result

296 nit

Review TCL A400 PRO Brightness measurement

Result

74 nit

Review TCL A400 PRO Brightness measurement

Result

543 nit

Scene from the movie “Pan” (about 2800 nits)

Scene from the movie “Billy Lynn” (about 1100 nits)

The photos show two HDR10 movies. 'Pan' is one of the brightest productions ever made, while 'Billy Lynn' (soldier) has brightness typical of streaming (Netflix, Prime, HBO MAX). Notice the intensity of effects and detail in whites.

Static HDR10

The photos present the visibility of white details in various HDR formats. They do not show brightness differences between TVs (these can be compared in the previous gallery).

Dynamic: HDR10+

Dynamic: Dolby Vision

The photos present the visibility of white details in various HDR formats. They do not show brightness differences between TVs (these can be compared in the previous gallery).

HDR luminance chart:

TCL A400 PRO

Samsung QLED Q70D / Q74D / Q77D

Luminance of RGB colors

The brightness that the Samsung Q70D can offer is at a rather average level, although it cannot be said that the HDR effect will not be noticeable. Any brightness above 400 nits allows for a clear distinction between SDR and HDR content. As was the case in the paragraph about contrast and black levels, we can also observe here that the first scene, featuring a bright sunny sky and a darker foreground, has the lowest luminance of those measured. The result, which can be considered very good for this price range and display class, is that one. In a scene where we see a large light source filling a significant portion of the frame, the brightness of the TV is at its highest, reaching nearly 500 nits. However, it is worth noting the rather low coverage of the wide DCI-P3 colour gamut, which sometimes results in noticeable shortcomings in the colour reproduction. Additionally, users can enjoy rich colours and high precision in rendering shades, making movie screenings a unique experience. It is also worth mentioning that the Q70D Samsung panel performs excellently in eliminating blur during dynamic action scenes, which enhances the viewing comfort of sports broadcasts or games.

The TCL A400 Pro is a moderately bright TV. Its peak brightness reaches around 600 nits. That level already allows for a real HDR effect and in many films it does deliver a noticeably more appealing picture than in SDR. However, it’s not a level that dazzles by brightness alone. The A400 Pro is not one of those TVs that bombard the viewer with a powerful flash in every dramatic scene. The biggest limitation is visible with small bright elements on a dark background. Because of fairly aggressive zone control, the TV can significantly reduce their brightness, in extreme cases down to around 100 nits. That means small lights, sparks, stars or single highlights can be much less visible than they should be. It should be added, though, that this isn’t done without reason. The A400 Pro does this to keep black levels as deep as possible and to limit the halo effect around bright objects. It’s a deliberate compromise: the TV more often opts for deeper blacks rather than maximising point highlights. On the one hand this is understandable, especially given a limited number of dimming zones, but on the other you should be aware that the HDR effect won’t always be as strong as the peak brightness alone might suggest.

On the plus side, the colours are a strength. The PFS LED filter used here, marketed by the manufacturer as QLED, delivers suitably saturated colours. Our measurements showed about 94% coverage of the DCI-P3 gamut and around 74% of BT.2020, which is a solid result for this class.

Factory color reproduction

6.1/10

8/10

This gallery shows how colors change after professional TV calibration. If you notice the difference, we recommend ordering this service at SkalibrujTV.com.

Factory Mode

After calibration

This gallery shows how colors change after professional TV calibration. If you notice the difference, we recommend ordering this service at SkalibrujTV.com.

Factory Mode

After calibration

The best factory mode in Samsung Q70D is "Filmmaker," and it was this mode that we used during all our tests. Before the calibration process, it had several flaws that effectively hindered the presentation of the director's intentions. In both SDR and HDR material, the white balance was dominated by red and green colours. As a result, there was a characteristic yellow tint on the image, which caused whites to appear yellowed and skin tones to be noticeably too warm. The reduced gamma in standard colour palette materials caused a significant drop in contrast, which was already not the highest. This led to the highlighting of details in the blacks, but also to clipping in brighter scenes. In this case, the EOTF curve proved to be much better and only brightened those scenes with quite low luminance. This was clearly visible in the section where we measured the maximum brightness of the television in HDR materials. At that time, a shot from the film "Billy Lynn" appeared unnaturally bright and lacking depth.

As usual, we carried out colour measurements in the best‑tuned picture mode, Filmmaker Mode, the one intended to be closest to the creators’ intentions. The A400 Pro, of course, also offers other picture modes, but in practice they show much larger colour errors and interfere more with the image character. So we won’t cover them in detail in this part of the review. How does the factory colour reproduction fare? In short: really very well. In fact, looking at our measurements, it’s excellent. Both the white balance and the luminance response were set surprisingly precisely. The errors were so small that during the measurements we genuinely rubbed our eyes in surprise. Such good factory settings don’t happen often, even in televisions running Filmmaker Mode. All the more reason to praise TCL, because the A400 Pro straight out of the box can produce an image very close to how the source material should look. The results were so good you could easily think someone had already given this unit extra attention and tried to calibrate it. Our one bit of nitpicking comes down to a single issue. In SDR material the image was slightly brighter than the reference for a dark room, because the factory gamma was set closer to 2.3 than 2.4. It’s not a large error and most viewers probably won’t even notice it. We should note, however, that we are talking about our specific test unit. There can always be some variation in factory colour between individual units, production batches or screen sizes. We do not assume every A400 Pro will look identical straight out of the box.

Color reproduction after calibration

8.1/10

8.2/10

The photos show how movies look on the TV. Pay attention to black detail visibility, colors, and shadow tint.

The photos show how movies look on the TV. Pay attention to black detail visibility, colors, and shadow tint.

Fortunately, Samsung provides a wide range of calibration tools in all its TVs, including 2- and 20-point grey scale adjustments and advanced CMS. As a result, we were able to significantly improve the quality of SDR and HDR content. The vast majority of errors have been corrected, and the image that the Samsung Q70D now delivers is definitely much closer to the reference. Higher deltaE errors in wide dynamic range content primarily result from the display's insufficient luminance.

Despite the outstanding factory tuning, we couldn't resist checking how the TCL A400 Pro would respond to professional calibration. With such a strong starting point, we were especially curious whether we could squeeze even more from this TV. And here we have to boast: we managed to bring our sample to absurdly low colour errors. Results below 1 are something you don't see every day, even on very good TVs. Such outcomes are more often associated with professional reference monitors than with a lifestyle TV for the living room. In terms of white balance and colour reproduction, the A400 Pro after calibration simply excelled. The only thing we can pick on after closer analysis concerns the brightness response. The TV can vary the luminance level depending on the content being displayed, and quite often the picture is a little darker than it should be according to the reference. This most likely stems from the way the Mini-LED backlight and the local dimming algorithms work in this model. That said, it doesn't ruin the overall impression, because in terms of colour precision the A400 Pro after calibration reached a level that was genuinely hard to expect.

Smoothness of tonal transitions

6.9/10

9/10

These are selected scenes that show smooth tonal transitions from one color to another. If you see distinct banding, it’s the TV panel’s fault.

These are selected scenes that show smooth tonal transitions from one color to another. If you see distinct banding, it’s the TV panel’s fault.

These are selected scenes that show smooth tonal transitions from one color to another. If you see distinct banding, it’s the TV panel’s fault.

These are selected scenes that show smooth tonal transitions from one color to another. If you see distinct banding, it’s the TV panel’s fault.

Considering how important lighting is in films and series, the overlapping structures and fluidity of tonal transitions constitute an extremely significant element in assessing image quality. The colour grading on the tested television is at quite a decent level. It cannot be said that it is outstanding, but it is not bad either. We assess it as acceptable. Brighter scenes perform best here, demonstrating the least amount of choppiness. In scenes recorded in darker settings, slight shortcomings in grading can already be noticeable, although it is not an issue that would cause discomfort while watching. This may be disturbed by the leaking backlight, which is clearly visible in the last image.

The TCL A400 Pro handles tonal transitions very well. Tonal gradation in most content is smooth, and any imperfections only appear in extreme cases, mainly on subtle grey transitions. It's worth noting that the vast majority of TVs struggle with scenes like these. What's also very good news is the lack of gradation issues in Dolby Vision. The A400 Pro did not introduce extra banding or visible artefacts in that format, which lately you can't take for granted. That's another factor that positively affects the viewing of films and TV series in HDR.

Image scaling and smoothness of tonal transitions

7/10

5.5/10

Image without overscan on the SD signal
No
OK
Smooth transition function
OK
OK

Smooth transition function

The match photo shows how the TV smooths weak tonal transitions in low-quality video.

Image scaling SD (576i)

The model photo shows how it handles upscaling of SD material.

The function responsible for improving gradation is named "Noise Reduction" in the menu. As we have confirmed, it is worth enabling as it has a beneficial impact on tonal transitions. More importantly, it does not negatively affect film grain or fine details, which sometimes the competition "offers" us.

The image scaling on Samsung Q70D should be rated as average. The manufacturer does not aim to artificially sharpen the image, but rather to keep it naturally softened.

Digital image processing is unfortunately one of the weaker points of the TCL A400 Pro. That does not mean the TV performs badly, but it’s hard to call it anything clearly above standard. The upscaling itself is acceptable: edges are fairly well smoothed, the picture does not look overly sharp or “pixelated”, and lower-quality material can be watched without major discomfort. At the same time the overall image has a slightly soft character and you don’t see the kind of precision that the best image processors in more expensive TVs can offer.

Handling of tonal transitions caused by heavy compression is much worse. TCL equipped the A400 Pro with a “Gradual Smoothing” feature that in theory should reduce visible colour banding and artefacts in lower-quality material. In practice, however, its effectiveness is very limited. It does not improve tonal transitions in any noticeable way, and at higher settings it can further smooth image detail, giving it an artificial, slightly blurred character. For that reason we think it’s best to leave this feature off. The A400 Pro copes decently with basic image scaling, but if you often watch heavily compressed material with visible posterisation, this model will not be one of the best choices.

Blur and motion smoothness

7.4/10

7.1/10

Maximum refresh rate of the panel
120Hz
144Hz
Film motion smoothing option
OK
OK
Blur reduction option
OK
OK
BFI function 60Hz
Yes, 60Hz (image flickers)
Yes, 120Hz (double contours)
BFI function 120Hz
No
Yes, 240Hz (double contours)
Brightness drop with BFI
30%
25%

Blur (native resolution, maximum refresh rate):

Blur (BFI function enabled):

Image flickers in this mode

Blur ():

Blur (4K@144Hz):

Samsung Q70D is the first model in the manufacturer's portfolio with a 120Hz panel. As a result, its motion smoothing features are more advanced than those in lower-tier models. In the menu, we find three functions responsible for improving fluidity. They are "Blur Reduction," "Judder Reduction," and "Clear Motion (LED)." We'll discuss the third one later. The first function enhances sharpness in motion, while the second adjusts the level of smoothing. The smoothness enhancer in Samsung Q70D works satisfactorily, and each setting makes a noticeable difference. Therefore, those who dislike the characteristic stuttering of films or who passionately watch sports will be able to achieve their preferred level of smoothness. In the image, we present a setting with slight smoothing, without the soap opera effect.

The panel used in Samsung Q70D has a fairly good response time for this type of display. Of course, it won't deliver an image as sharp as a proverbial razor, but at this price point, it is a recommended choice for all kinds of sports.

The TCL A400 Pro is equipped with a 144 Hz panel, but in practice we're most interested in how it performs at 120 Hz. That's the refresh rate most consoles, as well as many sports broadcasts and high-motion sources, are limited to today. In that range the TV performs quite well. Motion clarity is really good, especially after properly configuring the motion smoothing. The 'Motion Clarity' function improves smoothness. Its settings include two sliders that let you tailor the motion smoothing to your preferences, separately for low-frame-rate and high-frame-rate content. This allows you to achieve either a more cinematic look or a noticeably smoother image. If you don't want to fiddle with manual configuration, you can use built-in presets such as Low, Medium, High, Cinema or Nature.

Console compatibility and gaming features

9.5/10

9.8/10

  • ALLM
    Yes
    Yes
  • VRR
    Yes
    Yes
  • VRR range
    48 - 120Hz
    48 - 288Hz
  • Dolby Vision Game Mode
    No
    Yes
  • Correct implementation of HGIG
    Yes
    Yes
  • 1080p@120Hz
    Yes
    Yes
  • 1440p@120Hz
    Yes
    Yes
  • 4K@120Hz
    Yes
    Yes
  • Game bar
    Yes
    Yes

The tested television is equipped with four HDMI 2.1 ports. Interestingly, all of them have a bandwidth of 40 Gbps; however, during the testing process, we did not observe any negative effects associated with this situation. More importantly, Samsung Q70D supports all features stemming from the aforementioned standard. This news will surely delight all gamers, as it means that whether using a console or a PC, we can expect the highest possible comfort during gameplay. Given the standard absence of Dolby Vision HDR for this manufacturer, it is significant that the HGIG mode has been implemented correctly and there are no issues with setting up the calibration chessboard. We particularly note that Samsung is the only manufacturer to allow gaming with the smoothness enhancer switched on, without significant degradation. This means that titles running at 30 fps will be perceived like those with native 60 frames per second.

Samsung, as one of the first manufacturers, introduced the Game Bar to its televisions, which has since been consistently refined. It contains all the necessary information regarding gameplay parameters that we can change "on the fly".

In summary: Samsung Q70D will perform excellently both with consoles and with computers. All functions worked brilliantly, and there were no issues with them. The ability to enable the smoothness enhancer without significant increases in input lag is a true gamechanger.

In terms of gaming features the TCL A400 Pro performs brilliantly. The TV has practically everything you’d expect from a gaming TV today: support for 4K at high refresh rates, VRR, ALLM, correct implementation of HDR formats in games, including Dolby Vision, and HGiG. That means it works well with both next‑gen consoles and PCs. Another plus is the inclusion of a Game Bar, a dedicated panel with the most important settings for gamers. From it you can quickly check basic information about the signal, refresh rate or active features, and customise the appearance and behaviour of some settings to your preferences. It’s a solution that may not change picture quality by itself, but it greatly improves the convenience of using the TV while gaming. The only thing to criticise is the number of full HDMI 2.1 ports. The A400 Pro has only two such ports out of four, and one of them also serves as eARC. In practice this means that if you want to connect two next‑gen consoles and a soundbar you may run into some limitations. In that scenario you’ll need to either swap devices or use extra equipment, such as an AV receiver or a soundbar with HDMI inputs. Even so, it’s hard not to rate the A400 Pro very highly as a gaming TV. The gaming feature set here is genuinely powerful.

Input lag

10/10

9.8/10

SDR

1080p60
13 ms
14 ms
1080p120
7 ms
11 ms
2160p60
13 ms
14 ms
2160p120
7 ms
11 ms

HDR

2160p60
13 ms
14 ms
2160p120
7 ms
11 ms
4320p60

Dolby Vision

2160p60 DV
14 ms
2160p120 DV
11 ms

Results of latency on the Samsung Q70D are at a high level, regardless of the signal or resolution. All gamers will certainly appreciate the manufacturer's efforts, which allow a game running in 4K 120 Hz with HDR to have only 7 ms of latency, which is practically unnoticeable even in online gaming. It's worth adding that lag with the motion smoother turned on roughly doubles, which still means very comfortable gaming in this case.

Input lag on the TCL A400 Pro is very low. With a 120 Hz signal we measured about 11 ms, and about 15 ms at 60 Hz. These aren’t as low as the few milliseconds seen on some OLEDs, but in practice it doesn’t make much difference. The lag is small enough that controls remain quick, responsive and entirely comfortable both on a console and when connected to a computer.

Compatibility with PC

8/10

8.9/10

Chroma 444 (max. resolution and refresh rate)
Yes
Yes
Font clarity
Very Good
Very Good
Readability of dark text and shapes
Average
Very Good
Input lag in PC mode (4K, max. refresh rate)
13ms
11ms
Matrix subpixel arrangement
RGB
Max refresh rate
120Hz
144Hz
G-Sync
Yes
Yes

The photo shows the legibility of small fonts. Ideally, lines should be the same thickness on both light and dark text, with minimal pixel gaps.

After connecting the television to the computer and wishing to use it as a monitor, we can expect a low input lag of 13 ms, which is practically unnoticeable on the mouse-screen-eye line. Thanks to the correct implementation of chroma 4:4:4, the readability of fonts is at a high level, so you can confidently connect Samsung Q70D to your computer as a monitor and expect a comfortable experience with text.

The subpixel layout is BGR, which does not negatively affect the use of the television as a monitor. However, as operating systems are not adapted to this type of subpixel format, it may cause slightly less distinct contours. This is, however, something practically negligible, and only a handful of people may notice it.

TCL A400 Pro also performs quite well as a large PC monitor. Helping with that is, of course, the full suite of gaming features: VRR, FreeSync, G-Sync compatibility, a refresh rate of up to 144 Hz and very low input lag. If someone wants to connect a PC and play from the couch or at a desk, the TV is perfectly suited to that. Importantly, it also handles regular computer work well. At 120 Hz fonts are very clear, so browsing, working with documents or using the system doesn't strain the eyes. It looks a bit worse after switching to 144 Hz. Horizontal parts of letters become slightly darker. However, that's not something that seriously affects everyday use. Overall, text readability is very good.

Viewing angles

2.9/10

3.9/10

Brightness drop at an angle of 45 degrees
71%
79%

Due to the VA panel, the performance of Samsung Q70D in terms of viewing angles is its Achilles' heel. Even a slight shift off-axis leads to a significant loss of contrast and a substantial degradation of colours.

Viewing angles are not the strongest suit of the TCL A400 Pro. This is mainly due to the use of a VA panel, which brings advantages like better contrast but naturally performs worse when viewed at an angle. Just move further off the screen's axis and you'll notice a drop in brightness and colour saturation. So it's not on the level we're used to from IPS/ADS panels, and even less so compared with OLED screens, which in this respect still remain out of reach for conventional LCDs. The A400 Pro is simply best viewed as straight on as possible. That's when its picture looks its best.

Daytime performance

5.4/10

5.7/10

Panel finish
Satin
Matte
Reflection suppression
Average
Very Good
Black levels during daytime
Good
Poor

Panel brightness

TCL A400 PRO: 460 cd/m2

Samsung QLED Q70D / Q74D / Q77D: 449 cd/m2

The satin finish of the panel in the Q70D allows for quite good performance in a well-lit room. It is worth noting that reflections do not spread beyond their source, and thus do not bleed onto the rest of the panel. We also commend the maximum brightness of the TV in SDR content, which is 450 nits, allowing for comfortable content consumption during the day.

TCL A400 Pro does quite well in a bright living room. The biggest help is the matte screen finish, which very effectively mutes reflections and means you don't have to battle every window or lamp reflecting off the panel during the day. Add a decent SDR brightness of around 600 nits, so in terms of daytime image visibility it's really good. You should remember, though, that the matte coating has its price. In a brightly lit room the picture can lose a bit of depth, and colours don't look as punchy as they do in the evening. Reflections are much less visible, but at the same time colour saturation clearly drops. It's still a good TV for a bright living room; it just performs best when viewing comfort is the priority rather than the most eye-catching picture.

Panel details

Backlight Type
QLED
Mini-LED PFS LED
Software version during testing
T-NKM2DDEUC-1053.2
V8-0012T01-LF1V643.003175
Image processor
MT 5896, 2.5 GB RAM

Subpixel Structure:

Panel uniformity and thermal imaging:

Review Samsung QLED Q70D / Q74D / Q77D TV Panel details
Review TCL A400 PRO TV Panel details

Samsung QLED Q70D / Q74D / Q77D

TCL A400 PRO

TV features

7.4/10

7.4/10

  • System
    Tizen
    Google TV
  • System performance
    Good
    Good
  • HDMI inputs
    0 x HDMI 2.0, 4 x HDMI 2.1 40Gbps
    2 x HDMI 2.0, 2 x HDMI 2.1 48Gbps
  • Outputs
    Toslink (Optical audio), eARC (HDMI), ARC (HDMI)
    Toslink (Optical audio), eARC (HDMI), ARC (HDMI)
  • Network Interfaces
    Wi-Fi 2.4GHz, Wi-Fi 5GHz, Ethernet (LAN) 100Mbps
    Wi-Fi 2.4GHz, Wi-Fi 5GHz, Ethernet (LAN) 100Mbps
  • TV reception
    DVB-T, DVB-T2, DVB-S, DVB-S2, DVB-C
    DVB-T, DVB-T2, DVB-S, DVB-S2, DVB-C

Classic features:

  • Recording to USB (terrestrial TV)
    No
    No
  • Recording programming
    No
    No
  • Picture in Picture (PiP)
    Yes
    No
  • RF remote control (no need to aim)
    Yes
    Yes
  • Backlit remote control
    No
    No
  • Teletext
    Yes
    No
  • Audio only mode
    No
    Yes
  • Bluetooth headphones support
    Yes
    Yes
  • Simultaneous Bluetooth headphones & TV audio
    Yes
    Yes

Smart features:

  • AirPlay
    Yes
    Yes
  • Screen mirroring (Windows Miracast)
    Yes
    Yes
  • Voice search
    Yes
    Yes
  • Voice search in native language
    Yes
    Yes
  • Ability to connect a keyboard and mouse
    Yes
    Yes
Review Samsung QLED Q70D / Q74D / Q77D TV features
Review Samsung QLED Q70D / Q74D / Q77D TV features
Review TCL A400 PRO TV features
Review TCL A400 PRO TV features
Review TCL A400 PRO TV features
Review TCL A400 PRO TV features

Sound connection options

  • HDMI audio
    eARC (HDMI), ARC (HDMI)
    eARC (HDMI), ARC (HDMI)
  • Other audio outputs
    Toslink (Optical audio)
    Toslink (Optical audio)
  • Wireless audio
    Bluetooth
    Bluetooth

Supported audio formats (external HDMI eARC audio):

  • Dolby Digital Plus 7.1
    Yes
    Yes
  • Dolby True HD 7.1
    Yes
    Yes
  • Dolby Atmos in Dolby Digital Plus (JOC)
    Yes
    Yes
  • Dolby Atmos in Dolby True HD
    Yes
    Yes
  • DTS:X in DTS-HD MA
    No
    No
  • DTS-HD Master Audio
    No
    No

Senior accessibility

  • Numeric keyboard on TV
    No
    No
  • Font size adjustment
    Yes
    Yes
  • Audio description
    Yes
    Yes

The operation of Samsung Q70D is managed by the proprietary Tizen system. This is fairly well-known software, as the manufacturer has been developing it in their TVs for quite a long time. Its main advantage is smooth operation and a lack of significant stutters, which we can confirm through conducted tests. The biggest downside, however, is its closed nature. Although the app store is quite extensive, we are still dependent on the grace or displeasure of the manufacturer. Therefore, we will not be able to install missing items, even from a USB drive. A perfect example of this is this year's discontinuation of support for the Tidal app. On the other hand, a benefit, especially for Apple device users, is the implementation of AirPlay functionality, which allows for easy screen mirroring from a device to the TV. Fortunately, Samsung also provided the option to connect a keyboard and mouse for much quicker navigation through the TV menu. It’s worth mentioning that the manufacturer has thankfully included a remote that connects via Bluetooth this year, which often wasn't the case in the past. The Tizen system has one more advantage. It integrates very well with external devices, such as the NC+ decoder or soundbars. The connection process is very quick and does not require special skills.

In summary: The Tizen system is very efficiently functioning software, which is certainly a strong advantage of the TV. While more advanced users may complain about the lack of something like KODI, the rest will be satisfied.

Google TV

TCL A400 Pro runs on Google TV, so in terms of Smart TV we get a very solid package. All the most important apps are there: YouTube, Netflix, Disney+, Max, Prime Video, Apple TV and the rest of the services you’d expect today. It also includes Chromecast, voice search and Google Assistant. The system itself runs smoothly and is convenient, although, as with Google TV, the home screen can be heavily filled with recommendations and promoted content. Some will like that, others might find it a bit annoying. Functionally, however, it’s hard to seriously fault it.

Digital art gallery

The most interesting part starts with the digital gallery, because this is what is meant to set the A400 Pro apart from ordinary TVs. TCL provides access to over 80 artworks that can be displayed when the screen isn’t being used to watch movies or series. That way the TV doesn’t have to hang on the wall as a black slab but can actually look like a painting. An ambient light sensor, which adjusts the screen to the room’s conditions, helps with this. And here’s some good news compared with the older NXT Vision A300: the annoying brightness issue in art mode has been improved in the A400 Pro. Gallery settings are now separate from normal viewing, so you can set a lower brightness for artworks without disturbing the settings for films or TV. It may seem like a small detail, but in practice it’s very important, because it helps the screen look more like an artwork and less like a glowing TV. TCL also adds the option to create your own images using artificial intelligence. The maker talks about over 100,000 available pieces and variants, so there’s plenty to choose from. You can stick with the ready-made gallery or pick something more in line with your own taste and room decor.

Traditional features

The traditional TV features are much less exciting. The A400 Pro doesn’t stand out here. You get standard broadcast TV, a channel guide and basic options, but no major extras that would change the way you use conventional TV.

Apps

9.3/10

9.6/10

OK
Disney_Plus
OK
Amazon_Prime_Video
OK
Player_TVN
OK
Polsat_Box_Go
OK
Canal_Plus_Online
OK
TVP_VOD
OK
Apple_TV_Plus
OK
SkyShowtime
OK
Rakuten
OK
CDA_Premium_Browser
OK
Spotify
No
Tidal
OK
Netflix
OK
YouTube
OK
HBO_MAX
No
Kodi
OK
Apple_music
OK
Eleven_sports
OK
Xbox Game Pass
OK
GeForce NOW
OK
Amazon Luna
OK
Boosteroid
No
Steam Link
OK
Disney_Plus
OK
Amazon_Prime_Video
OK
Player_TVN
OK
Polsat_Box_Go
OK
Canal_Plus_Online
OK
TVP_VOD
OK
Apple_TV_Plus
OK
SkyShowtime
OK
Rakuten
OK
CDA_Premium_Browser
OK
Spotify
OK
Tidal
OK
Netflix
OK
YouTube
OK
HBO_MAX
OK
Kodi
No
Apple_music
OK
Eleven_sports
No
Xbox Game Pass
OK
GeForce NOW
No
Amazon Luna
OK
Boosteroid
OK
Steam Link

Playing files from USB

9.1/10

9.5/10

Supported photo formats:

JPEG
Yes
Yes
HEIC
No
Yes
PNG
No
Yes
GIF
No
Yes
WebP
No
Yes
TIFF
No
No
BMP
Yes
Yes
SVG
No
No

Maximum photo resolution:

4 Mpix
Yes
Yes
6 Mpix
Yes
Yes
8 Mpix
Yes
Yes
10 Mpix
Yes
Yes
12 Mpix
Yes
Yes
16 Mpix
Yes
Yes
20 Mpix
Yes
Yes
24 Mpix
Yes
Yes
28 Mpix
Yes
Yes
32 Mpix
Yes
Yes

The built-in player Samsung Q70D is a significant advantage. It handled nearly all video and audio files prepared for the testing process exceptionally well. The only exceptions in this regard are of course the Dolby Vision format (which is not surprising) and less popular codecs. Additionally, it is worth noting the support for Polish characters and the ability to change font colours as a positive aspect. However, it struggles more with photo formats, as it only supports JPEG among the popular ones. There's definitely a lack of formats like PNG or Apple's HEIC here.

Playing files from USB is one of the strong points of the TCL A400 Pro. The built-in player performs very well and can easily be counted among the best. It handles popular video, audio and photo formats without any trouble, so in most cases you just need to plug in a USB stick or external drive and play the content. That's good news, because you don't have to install third-party players straight away. The A400 Pro natively supports a really wide range of files and in our testing it had no major problems playing them.

Sound

6.3/10

6.6/10

  • Maximum volume
    -
    83dB
  • Dolby Digital Plus 7.1
    Yes
    Yes
  • Dolby True HD 7.1
    Yes
    No
  • Dolby Atmos in Dolby Digital Plus (JOC)
    Yes
    Yes
  • Dolby Atmos in Dolby True HD
    Yes
    No
  • DTS:X in DTS-HD MA
    No
    Yes
  • DTS-HD Master Audio
    No
    Yes

The built-in audio system Samsung Q70D, due to its slim design, is not among the most outstanding. Overall, it's fairly balanced, although we wouldn't recommend cranking up the volume to levels higher than 2/4 of the scale. However, if we have a home theatre system, there is a range of codecs available, and we can enjoy the presence of the most important ones, namely DTS-HD Master Audio and Dolby Atmos.

Sound on the TCL A400 Pro is fairly average. The most important bit of good news is that the TV can play loudly. It easily reaches around 83 dB, so volume itself isn’t much of an issue. It’s also a plus that it supports formats such as Dolby Atmos and the increasingly rare DTS in TVs. But that’s about where the praise ends. The standard 2.0 speaker setup has its limits and it’s hard to squeeze much more out of it. What’s mainly lacking is bass and a sense of space. The sound is fine for regular TV or YouTube, but with films, series and especially music it quickly becomes too flat. For that reason we would definitely recommend buying at least a simple soundbar or a traditional home cinema system. Especially since the TV itself supports Dolby Atmos and DTS, it practically begs to be connected to external speakers that will actually use those capabilities.

Sound Quality Test

No sound test video

Acoustic Measurements

No acoustic data

83dBC (Max)

75dBC

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