Hisense U7KQ vs TCL C69K / Q6C

Describing the HDR effect in the hundred-inch model Hisense U7KQ is not straightforward and requires a broader context. As can be seen, the results are highly variable, depending on the type of scene and the intensity of the bright effects that the television has to reproduce. In bright scenes, the device achieves over a thousand nits of brightness, translating to vivid and realistic images – these are exactly the effects we expect from equipment of this class. Unfortunately, the situation worsens in darker scenes. In mixed shots, such as those in the film "Gemini Man," the television still offers good brightness at around 700 nits, allowing for high-quality viewing. However, problems arise in very dark scenes where small light sources play a major role. The television does not fully utilise its capabilities here to avoid degrading the black levels in adjacent areas. As a result, there is no spectacular "WOW" effect, and such shots often do not give the impression of being realised in HDR technology.

In terms of brightness, TCL C69K / Q6C is a moderate model. In optimal movie conditions, it shows its full potential, reaching a maximum of around 600 nits. In scenes with large, intense light sources, the HDR effect can be truly satisfying, giving a cinematic glow. However, it's important to keep in mind that when managing the backlight zones, there are situations where parts of the image are dimmed, and at times become barely visible. This suggests that there is still a lack of proper optimization of the algorithms, although considering the technical parameters in this price range, the overall construction still looks very good.

The best factory mode we measured was “Filmmaker”. Despite this, its characteristics left a lot to be desired. Let’s take a look at the gamma chart, which is responsible for the depth and contrast of the image. First, we'll note the orange line running through the middle of the graph, starting at point 2.4. This is the reference value of the REC.709 standard. Now let’s look at the measured value, marked by a white, connected multi-point. Such a clear drop in gamma to a value of 2.0 meant a significant reduction in contrast, resulting in the image lacking appropriate depth, and the so-called “milk” effect was noticeable. The next thing we tested was the white balance. Though seemingly minor, if poorly adjusted, it can change the entire characteristic of the image. While the beginning of the chart looked quite promising, as we progressed further, the chart began to be dominated by two colours: red and blue. Due to the current state of affairs, all the materials we used for testing had an unpleasant tint in those colours. However, thanks to rich calibration tools, such as an advanced colour management system (CMS) and 2- and 20-point grey scale adjustments, we were able to significantly improve the display's performance in SDR materials, as confirmed by low deltaE errors and very well-modeled gamma and white balance.

The Filmmaker Mode, which has been introduced in this year's TCL TVs (including the C69K / Q6C), is definitely the best choice "to start with". This is the mode we recommend for everyday movie and series viewing. Unfortunately, as is often the case, best does not mean perfect. In SDR materials, the image turned out to be too warm, with a strong red tint in the white balance. The opposite impression was had with HDR content – here the image became cooler than it should have been, due to an excess of blue. Additionally, there is the brightness characteristic, which at times resulted in overexposures. In practice, this translated to fairly noticeable errors in color tests, which is difficult to accept in a mode branded as "by the creators".

In SDR mode, after calibration, the Hisense 100U7KQ television performs excellently. There is nothing to fault in terms of colour reproduction - both pastel and deeply saturated hues are displayed according to the Rec. 709 standard. This ensures that the image looks natural and in line with the director's vision. As a result, viewers can enjoy an authentic visual experience, with colours and tonal subtleties faithfully represented.

In HDR mode, however, there is a noticeable boost in bright tones. The television tries to enhance the image, which can lead to artificial brightening. This phenomenon becomes even more apparent in real scenes, where bright parts of the image can be excessively amplified. Although colours in HDR are generally good, they are intentionally boosted too much by the manufacturer, which may affect their naturalness.

This manufacturer's approach to displaying images in HDR mode may not be to everyone's taste, especially those who value authenticity and fidelity to original colours. However, for those who prefer more dynamic and vivid images, this bright tone enhancement can be an appealing solution, adding extra sparkle and impact to scenes.

Through white balance adjustment, we were able to significantly reduce the tendency of ChooseTV C69K / Q6C to distort colours, which resulted in a very good final outcome. After calibration, the problem of excessive warming of scenes in SDR and over-cooling of the image in HDR disappeared. However, it's worth analysing the brightness characteristics more closely. While in SDR content there are few complaints – the picture looks really good, especially in older films, TV programmes, or on YouTube – it performs much worse with HDR content. Analysis of the EOTF curve suggests that everything is fine, but in practice (EOTF in films), the limitations of the actual construction become evident. This model tends to excessively brighten small parts of the frame, while in other situations, it darkens the entire scene too much. The effect of calibration is therefore undeniable, and in terms of colourimetry, ChooseTV C69K / Q6C gains a lot. Unfortunately, certain limitations arising from local dimming management simply cannot be bypassed.

Despite the television being equipped with a function to reduce posterisation called "Smooth Gradation", we did not notice a significant effect of its operation. Materials subjected to heavy compression, such as YouTube videos, still showed choppy, abrupt tonal transitions, which did not look particularly appealing. While this is due to the material itself and not the television, it would be good if there was a function to mask these issues, similar to those found in competing brands.

Image scaling, which is crucial when playing lower resolution content, we rate as average. Details are not overly blurry, and the image is not "smudged", however, there is noticeable jaggedness on the edges of objects, such as branches, and a halo effect around characters and text. While the television performs quite well, there is still room for improvement, especially in the context of displaying lower quality materials.

In terms of image scaling, TCL C69K / Q6C performs quite well. Lower quality content is presented acceptably, and due to the lack of overscan issues, the image is displayed in full without any cropping. However, don’t expect miracles – materials of very low quality won’t gain a second life here, as the image processor has its limitations.

On thin lines and details, there is noticeable jaggedness, which reveals the lack of more advanced image enhancement algorithms. It's also a shame that the C69K / Q6C lacks a feature for smoothing tonal transitions. As a result, in older films or video materials, color banding can be visible and may become distracting during extended viewing.

The TV correctly receives a 4K signal up to 144 Hz, allowing for very smooth images in high resolution. When limited to Full HD resolution, the TV can handle even 240 Hz, but such a signal can only be obtained from a PC. Unfortunately, the use of this feature is limited by several factors.

Firstly, Full HD resolution on a large TV screen may seem insufficient, affecting image quality. Furthermore, the response time of the panel in this model is not short enough to fully utilise the refresh rate of 240 Hz. As a result, at such a high refresh rate, there is significant overdrive, which causes noticeable smearing and so-called "ghosting" behind moving objects.

It is also worth noting the motion smoothing feature in the TV, which operates up to 120 Hz. This is particularly useful when watching sports and movies, where motion smoothness is crucial. The TV offers stable operation of this feature, minimising the amount of generated artefacts. Motion smoothness can be adjusted using two sliders – one for smoothness in movies and the other for reducing smearing in sports content.

In summary, although the TV Hisense U7KQ offers impressive capabilities in image refresh rates, limitations related to the response time of the panel and appropriate resolution may affect the actual benefits of these features. Nevertheless, the motion smoothing function works very well, enhancing the experience of watching dynamic content.

The use of a 144 Hz panel in TCL C69K / Q6C is a significant advantage in this price range. This represents an important step forward compared to its predecessor (C655 PRO), which only offered 60 Hz at 4K. The difference is particularly noticeable when watching sports or gaming – the ball, players, and dynamic action in games are displayed more clearly and without losing detail. An interesting feature is also the panel's ability to operate at 240 Hz (which the manufacturer does not officially mention) – we will revisit this topic in relation to the PC gaming mode. TCL has also added a feature for movie fans: “Motion Clarity.” This allows users to adjust the picture to their own preferences using two simple sliders. We can either leave the visible film frame or opt for a very smooth one, "

The Hisense U7KQ TV supports all the key features for gamers that users of Xbox or PlayStation consoles might expect. These features include support for high refresh rates, low input lag, and a game bar. Generally speaking, most of these features work well, providing a satisfying gaming experience.

However, the VRR (Variable Refresh Rate) technology does not function optimally. When VRR is activated, the TV disables local dimming, which significantly reduces image quality. In VRR mode, there is a lack of good contrast and high brightness in HDR mode, resulting in unsatisfactory image quality. In practice, this means that the VRR mode may be rarely used by gamers due to these limitations.

Additionally, the TV does not support the HGIG (HDR Gaming Interest Group) mode, which is designed to optimise HDR image quality in games. The absence of this mode leads to issues with double tone mapping—once in the TV and again in the console. As a result, the quality of HDR gaming is lower, which can affect the overall gaming experience.

In summary, while the Hisense U7KQ offers many features for gamers, certain key aspects, such as optimal VRR performance and support for HGIG, may not meet the expectations of more demanding users. Nevertheless, the TV still provides good support for most standard gaming features, making it a suitable choice for a wide range of gamers.

TCL C69K / Q6C is a television that can confidently be called equipment designed for gamers. Here we have 4K at 144 Hz, VRR support, automatic game mode (ALLM), and Dolby Vision Gaming. Additionally, there's a practical Game Bar, which is a panel with the most important settings within easy reach – handy when we want to change something quickly during gameplay (e.g., aspect ratio: Yes, it can be done!). The wide range of VRR, reaching up to 240 Hz, is noteworthy. However, this option is mainly for PC gamers looking to go below native 4K resolution. In this case, the television can spread its wings and show additional smoothness, particularly in fast e-sport titles. For consoles, we stick to the standard limit of 120 Hz, but even so, the possibilities are truly extensive. The only minor criticism is slight ghosting that can sometimes be seen in dynamic scenes. Other than that, C69K / Q6C offers everything gamers expect from a television.