Philips MLED920 / MLED910 vs TCL A400 PRO

Philips MLED920 in our measurements in static tests even reached around 900 nits, which for a mid-range model is quite an impressive result. In practice, this translates to a lot of satisfaction during viewing – in scenes rich in bright light, such as the first, third, or fifth test patterns, the screen was able to generate around 700 nits, which is sufficient to feel the real "HDR effect". However, it cannot be denied that the limited number of backlight zones and the typical mini-LED compromises in dimming algorithms reveal their flaws in more demanding scenes. In sequences with small light sources – like the moon or a scene from the film Sicario 2 – the television clearly prioritises maintaining deeper blacks at the expense of the brightness of these small elements. For most viewers, this is still a reasonable compromise, as the dark background looks much better, although it should be noted that the details themselves may not dazzle with intensity. The question of colours also leaves a bit to be desired. Although the employed PFS filter (the equivalent of quantum dots known from QLEDs) does its job and the colours appear quite vibrant, the coverage of the DCI-P3 colour space reaches "only" 90%. In everyday viewing, this will be sufficient, but in extremely colourful productions – like the latest Disney animations – one can notice that some tones are not as vivid as they could be in other constructions.

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.

Like every Philips TV we've tested, the MLED920 was primarily assessed in Filmmaker mode – the so-called "most honest" mode, designed for films and to faithfully convey the intentions of the creators. Indeed, in terms of colour accuracy, it performs best among all the modes available on the TV, but it is not without flaws. The first thing that stands out is the white balance. The image has a slight tendency towards purple-pink tones, giving it a somewhat unnatural character. However, an even bigger problem turned out to be what we mentioned earlier – image clipping. Just looking at the gamma or EOTF charts reveals that the line deviates significantly from the norm, dropping below a value of 1.8. In practice, this means "bleeding" of the brightest whites, where the image becomes almost milky. Fortunately, most of these issues can be corrected – the MLED920 responds to calibration, and with a few adjustments, image quality can be significantly improved.

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.

After calibration, we managed to largely tame the white balance – to the extent that the average viewer will not be able to detect colour inaccuracies. The characteristic pink-purple glow that previously disrupted the naturalness of the image has also disappeared. The colour palette has been organised, and the colours appear more cohesive and neutral. The gamma in SDR content looks really good after calibration – there’s no sign of the earlier “bleeding” effect in bright scenes. The image has become more contrasty and free from the milky effect that previously severely affected the viewing experience. In the case of HDR content, the improvement is also noticeable, although here it is still evident that the television goes “its own way”. The EOTF curve cannot be fully adjusted, as Philips simply does not offer tools for precise control of this parameter in its settings. In many films, the television still exposes the image “in its own way”. Despite these limitations, calibration has brought a lot of good – the majority of colour inaccuracies have been minimised and the overall image balance has significantly improved. However, one must remember that certain barriers arise from the very hardware construction and simply cannot be overcome.

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.

The manufacturer has equipped this model with several features that improve signal quality, and although we usually approach such “enhancers” with caution, here they prove to be really helpful. The key option is called “distortion reduction” – it works best at a medium level because, on one hand, it effectively smooths out unwanted steps and colour transitions, and on the other, it doesn’t excessively cut details, meaning the image still looks natural.

It’s a bit worse when it comes to upscaling. Lower quality materials – such as the test video with the model – appeared soft and lacking sharpness. Of course, it can be partially adjusted with the sharpness slider in the menu, but the result still falls short compared to what competitors offer at a similar price. Philips still needs to work on this aspect because, in light of the successful improvement of tonal transitions, the upscaling simply comes off weak.

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.

Philips MLED920 features a 144 Hz panel, which immediately suggests that we shouldn’t complain about motion smoothness. And indeed – for a VA panel, the motion blur is relatively low here, and while you can sometimes notice slight issues on darker backgrounds, they’re not something that will catch the eye of most people during regular viewing.

A big plus is also the presence of a motion smoother called “Motion Style.” It allows you to adjust the smoothness to your own preferences – if someone prefers a more “theatrical,” almost television-like character of the image, they can increase the sliders, and if they want to maintain the natural “judders” of a cinematic frame, they just need to set lower values. This way, everyone can find a happy medium.

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.

For gamers, the Philips MLED920 is truly a complete tool. The manufacturer has taken care of everything that is now considered standard in televisions for consoles and PCs. It has ALLM, so the console automatically switches the screen to game mode, there’s VRR and a 144 Hz refresh rate that ensures smooth gameplay even in fast-paced titles. All key HDR formats are supported – including HGiG and Dolby Vision Gaming for Xbox – which means that regardless of what you’re playing and on which console, the television will be able to extract the maximum potential from the image. In everyday gaming, the Game Bar proves useful too – a relatively simple implementation by Philips, but a functional panel where you can quickly check image parameters, enable VRR, or adjust details without leaving the game. It’s not as elaborate as the competition, but it does its job without any complaints. And finally, something that sets Philips apart from the competition – Ambilight. The three-sided LED backlighting can make a huge impression in games, especially in the evening. It’s also a way to slightly 'expand' the screen and create a greater sense of immersion. And since coloured LEDs have recently become almost an essential element of a gamer’s room, the MLED920 fits perfectly into this trend.

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.