Hisense U8Q vs TCL A400 PRO

When it comes to HDR, the Hisense U8Q shows its claws. On paper, meaning in synthetic measurement tests, the TV can "push out" nearly 4000 nits of peak brightness. This is a value that most models can only envy. In practice, this translates to very strong light effects in movies – in some scenes we managed to measure real levels from 1500 to 2000 nits, which is a level usually reserved for the absolute top-tier TVs on the market.

Of course, it's not always so perfect. In small, point-like elements, brightness can drop – a good example is scene number 4 from the movie Sicario 2, where instead of thousands of nits we get about 500. But it's worth noting that the effect doesn't disappear completely – the light is still visible, and the image doesn't appear artificially dimmed. This is a typical issue with Mini LEDs, so it’s hard to consider it a major drawback.

However, a huge plus has to be granted for colour reproduction. Thanks to additional coatings improving colour saturation, the U8Q almost covers the entire DCI-P3 colour space (98%), and for the wider BT.2020 gamut it achieved over 80%. This is an excellent result that makes HDR films look juicy, intense, and just very cinematic.

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.

We have to admit that when the U8Q arrived in our editorial office, we were slightly surprised… and in a good way. Usually, white balance in televisions immediately requires adjustment – it can be too warm or too cold, which immediately causes strange colour errors. Meanwhile, here the situation looks really good straight out of the box. Of course, we’re talking about our unit, so there’s no guarantee that every model will be tuned as well, but in our case, the first impressions were very positive. The only more noticeable issue was related to how the television manages brightness. Looking at the EOTF chart, it’s clear that the U8Q tends to brighten small elements on the screen. This, in turn, caused what we mentioned earlier – slight overexposure and the impression that the whole scene is a bit too bright. However, this is not a flaw that negates the picture, rather an effect characteristic of this model.

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.

Of course, we wouldn’t be ourselves if we didn’t make adjustments to the white balance. After calibration, we managed to level the SDR signal to near perfection – older films, YouTube content, and classic television looked nearly ideal on the U8Q. It’s truly an impressive level that shows this model can do a lot if given a bit of help. Unfortunately, the situation is different with HDR content. The colours themselves don’t pose much of a problem, but the biggest issue with the U8Q remains the EOTF brightness characteristics. In practice, the television tends to "shoot" above how the image should originally look. It’s this slight "blowout" we noticed earlier in comparisons with the best screens on the market. It’s a bit of a shame that this characteristic can't be completely tamed – if we could maintain equally good brightness control in HDR as we do in SDR, we would be looking at an absolutely reference-level image.

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.

Hisense U8Q handles lower quality materials quite well. The television can smooth tonal transitions thanks to the “Smooth and Gradient Picture” feature – it works best on the Medium setting. It nicely dims unwanted bands and irregularities in the image, but importantly, it doesn't remove the film grain or fine details.

The upscaling itself is also at a good level. Image from lower resolutions appears smooth and soft, sometimes a bit too much – we get a plastic effect that may not appeal to everyone. Fortunately, this can be easily corrected with the sharpness slider, allowing you to adjust the image to your personal preferences.

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.

Hisense U8Q has a panel that can refresh the image up to 165 Hz in 4K resolution. In practice, this will mainly benefit PC gamers, but as they say – better to have it than not 😊. For movies and series, we have a built-in smoother called Ultra Motion Smoothing. In the settings, it can be easily adjusted to your own preferences – whether you want a more ‘cinematic’ frame rate or a smooth, theatrical spectacle.

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.

In terms of features, the Hisense U8Q has practically everything one would expect from a modern gaming television. Thanks to the new processor, the manufacturer has managed to implement three HDMI 2.1 ports, so there’s no trouble connecting multiple consoles or a computer. On top of that, it includes all the key technologies – Game Bar with parameter previews, variable refresh rate (VRR), automatic game mode (ALLM)… in a word, a complete set.

But as often happens with Hisense, it’s missing just a bit from perfection. The biggest drawback remains the lack of support for the HGiG format, which allows the TV's brightness to be adjusted to the console and gets the most out of HDR in games. It’s a shame because if this feature were included, we’d have a device practically made for gamers. As it stands, the U8Q remains “only” a very good choice 😉

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.