The TCL C75B television tested by us in size X" is equipped with a VA panel, which naturally provides quite decent contrast results – and this was also observed during our tests. On each test pattern, the television achieved a contrast ratio of around 5500:1. This is a result that can be considered very good in this price range. The black levels on this model perform really well, although of course, they are far from perfect.
Due to the C75B's belonging to the mid-range segment, we do not find local dimming technology here. This is particularly noticeable in more demanding scenes, such as those from the film Sicario 2, where we observed that the black takes on a navy shade instead of a deep black. This limitation of panels without local dimming can be especially visible in evening screenings with the lights off, when the dark elements of the image are more prominent. It is worth remembering this when choosing a television in this category, especially if we care about the best quality of black while watching films at night.
Let's get to the point, which is what is most important in the Mini LED panel: black levels and contrast. The Xiaomi S Pro 2026 is built on a VA matrix, which already promises deep blacks from the start. Adding to that is the Mini LED backlighting with a very large number of local dimming zones. In the 65-inch variant we tested, we counted as many as 532. This is a solid number that should provide precise control over the backlighting. It should be noted that this number is proportional to the size – by choosing the smaller 55-inch variant, there will be correspondingly fewer zones, and in larger models, more.
So, how does the black level perform on the S Pro 2026? The answer is complex.
Overall, it is really quite good, and we see a clear improvement compared to the problematic model from 2025. As you can see from our measurement charts, the results are sometimes spectacular. In most of the film scenes we measured in SDR (standard dynamic range), the contrast could be confidently described as very good and even comparable to designs three times as expensive. Well, it could be... and here we come to the paradox of this model. The issue is how the television manages the zones in scenarios other than SDR. As soon as we feed the television a higher-quality signal, such as an HDR series or Dolby Vision from streaming platforms (Netflix, HBO Max or Disney+), something strange happens. We have the undeniable impression that the television suddenly... forgets that it has been equipped with local dimming zones at all. As can be seen in our video below, the black levels in such scenes resemble more shades of dark grey or navy blue. Additionally, there is a subtle flickering of the entire screen. This is a level we would expect from televisions entirely devoid of a local dimming system. It seems that Xiaomi decided to fix one, but key, flaw of last year's 2025 model over the course of a year. And they succeeded – we no longer have the annoying "zone disco", the image is stable. It's just a shame that when consuming content of the highest quality (HDR), this entire advanced system becomes completely useless.