TCL C655 Pro vs Hisense U6NQ

In the HDR effect quality category, the TCL 655 PRO television shows decent capabilities, achieving 550 nits of peak brightness. This allows for enjoyment of HDR effects, which is clearly visible in scenes such as the first from the movie Life of Pi or the last frame from The Meg. However, the limited number of dimming zones causes some problems. While in bright scenes the television performs better than its lower model, in more demanding scenes, such as the second and fourth scenes from Sicario 2, it struggles. The dimming algorithm aims for deep blacks, but at the cost of brightness – which in these moments leads to a decrease in brightness by as much as half. In these more challenging scenes with small elements, it is hard to find any praise, and the HDR effect resembles rather SDR. Nonetheless, the coverage of the color palette deserves commendation, which, like in the version without the PRO suffix, is at a very good level.

Hisense U6NQ offers a stable HDR effect, which is rare in TVs with local dimming. On most streaming platforms, in movies and series recorded in 4K, the TV presents consistent performance – in every tested scene, regardless of difficulty level, brightness is around 450 nits. This is a pleasant surprise, as many models in this class show significant differences – some scenes are well-lit, while others are heavily dimmed by dimming algorithms. However, Hisense U6NQ prioritizes maintaining higher brightness, which comes at the expense of black levels, as mentioned in the paragraph about contrast testing.

The HDR effect on the U6NQ is satisfying, offering a noticeable "hit" of light in bright moments, although it is worth remembering the previously mentioned blooming, which can be visible in more challenging scenes. In terms of colors, the TV also performs decently – the coverage of the DCI-P3 palette is 89%, and BT.2020 is 71%. Although these are not results that would impress more demanding users, for beginners in the world of high-quality content, the U6NQ serves as a solid choice. Thus, it presents an interesting option as an "entry-level" TV for home cinema.

Each of our TV tests is conducted in movie mode, which usually offers the best color reproduction. Nevertheless, even this mode is not free from problems, as we noted with the TCL 655 PRO model.

In the case of HD content, the white balance clearly shifts towards red, and this effect becomes particularly noticeable in a scene from Star Wars, where the white elements of the scenery take on a pink hue. For 4K HDR material, the situation looks better, but there is a tendency to excessively enhance the blue color. As a result, the image can appear artificially sharp, which proves to be uncomfortable for the eye over a longer period. The brightness characteristic also leaves much to be desired. The Gamma chart indicates serious difficulties with excessive brightening, causing the overall presentation to look washed out. Additionally, the EOTF curve reveals significant issues with the reproduction of very small elements - they are excessively dimmed, as we detailed in the paragraph regarding HDR effects.

The Hisense U6NQ in Filmmaker mode offers truly decent color reproduction, although it is worth noting that differences between individual units can be noticeable. The model we tested surprised us positively, especially with HD content in SDR quality. The white balance was correct, and errors around 3–4 ΔE should be acceptable for the average viewer. The TV performed slightly worse in color reproduction with 4K HDR materials. The dominance of blue hues led to unnatural cool tones on the Colour Checker chart, giving the picture a "store-bought" character. Combined with issues in brightness characteristic – gamma and EOTF curve caused some parts of the image to be too dark – the Filmmaker mode loses some of its credibility in this case. Although the factory settings of the tested unit deserve praise, especially in SDR, there were still minor shortcomings that would require adjustment to fully leverage the capabilities of the TV.

After calibrating the TCL 655 PRO television, a noticeable improvement in white balance can be observed, having completely eliminated the tendency for the screen to have an excessive pink hue, which was previously visible in factory mode. The image has taken on more natural tones, especially in white and bright elements, positively affecting the overall perception of the picture. As for brightness characteristics, the Gamma chart has also improved – the screen is no longer excessively bright, which previously made the image look washed out. Nevertheless, there are still some issues with the EOTF curve that are difficult to eliminate due to the design of the television and its limited number of dimming zones. These limitations prevent achieving ideal results in this regard. However, despite this minor flaw, the overall effect after calibration is truly outstanding, providing high image quality and very good color reproduction.

Although the factory settings of the Filmmaker mode on the Hisense U6NQ were quite good, we decided to carry out a calibration to fully assess the capabilities of this model. Only after such an adjustment can you see how the TV performs in ideal conditions. In the case of SDR content, which was already at a high level, we managed to further improve the white balance. However, the biggest change came from the brightness characteristic correction - gamma was optimized and no longer causes excessive dimming of the image, which improves its naturalness.

For 4K HDR content, calibration also yielded positive results. We eliminated the problem of blue dominance, which translated into a more balanced and natural image. However, managing brightness in HDR materials remains a more complicated issue. The EOTF curve, although it had problems with dimming the image in the range of 10-30% brightness under laboratory conditions, reveals other shortcomings in real scenes. The TV tends to excessively brighten the smallest elements on the screen. As a result, this leads to noticeable halo effects around bright objects. This phenomenon, which we mentioned earlier in the context of contrast and HDR, stems from the technological limitations of the model and is often difficult to eliminate.

In short: although the Filmmaker mode with factory settings looked decent, calibration allowed for an even better effect - minor adjustments resulted in a more balanced image, especially in HDR content. For users seeking the highest quality image, calibration will be a beneficial step.

The TCL 655 PRO television handles tonal transitions in lower-quality materials quite well. The "Gradual Smoothing" feature at a low setting effectively smooths out tonal transitions; however, this comes at the cost of losing some important details, such as the texture of objects. A positive aspect is that it does not negatively affect film grain, which helps maintain the natural look of the image.

In the context of digital processing, the television adds artificial sharpness. This may appeal to users who prefer a more vivid image. However, those who favor a softer, subtler look may find this to be a drawback. Additionally, a downside is the image cropping due to overscan, which limits the field of view and trims the edges of the frame. This can be problematic in certain scenes - e.g., news tickers.

With high-quality materials, such as 4K, tonal transitions on the U6NQ look really good – the colors blend nicely and the image is cohesive. Unfortunately, when we switch to content in a lower resolution, the television does not offer any additional features that could improve this aspect. An example is the test with the light bulb, where it is clear that the television has trouble rendering subtle tonal transitions.

On the other hand, digital processing performs quite well. The image looks plastic, is pleasantly soft, and free of excessive aliasing. Moreover, thanks to the sharpness settings, it can be adjusted according to personal preferences – whether towards a softer or sharper image. Overall, although scaling lower-quality materials could be better, the television does well with image processing.

The TCL C655 PRO TV is equipped with a 4K panel with a refresh rate of 60 Hz, making it ideal for watching movies. Additionally, the "Flicker Reduction" feature allows users to adjust the fluidity of the image, giving them the choice between smoother motion or a cinematic, choppy effect. Moreover, the TV handles lower resolution content well, such as Full HD and 2K, offering a refresh rate of 120 Hz, which will certainly appeal to gamers who can enjoy smoother images, albeit at the cost of lower resolution.

The Hisense U6NQ offers a native refresh rate of 60 Hz at a 4K resolution, but the manufacturer has added a feature that allows increasing the refresh rate to 120 Hz at the cost of reducing the resolution to Full HD. This is a solution we have seen before in TVs from TCL, such as the C655 and the C655 PRO. This gives the user the option to choose – higher motion fluidity or full resolution. This is a sensible approach, especially considering that many games on new generation consoles do not achieve full performance in 4K at 120 Hz.

As for movies, the TV is equipped with a motion smoothing feature that allows adjusting motion characteristics to personal preferences. This can create a more cinematic effect or increase fluidity in dynamic scenes. Overall, the Hisense U6NQ offers reasonable solutions for motion fluidity that should satisfy both gamers and movie lovers.

The TCL C655 PRO television offers an almost perfect set of features for gamers, supporting all key technologies that significantly improve the gaming experience. The ALLM feature automatically switches the television to low latency mode, resulting in better responsiveness and minimized signal delays – particularly important in dynamic titles. VRR synchronizes the screen refresh rate with the number of frames generated by the console, eliminating screen tearing and thus guaranteeing smoother gameplay.

Support for Dolby Vision in game mode allows for more detailed color and contrast reproduction in games that support this format, while the Game Bar provides quick access to important settings such as response time or latency level. Unfortunately, this model does not support 4K resolution at 120 Hz, which may disappoint the most demanding gamers. However, for those who can forgo 4K, support for Full HD and 2K at 120 Hz offers exceptionally smooth visuals, making it an attractive alternative for enthusiasts of higher refresh rates.

The Hisense U6NQ offers the option to choose between 4K at 60 Hz and Full HD with a refresh rate of 120 Hz. This solution may appeal to gamers who want to decide what is more important to them – higher resolution or smoothness. The television supports features such as ALLM and VRR, which help in achieving smoother gameplay. A nice addition is the GameBar – an easy-to-use panel that allows for quick changes to picture settings and checking statistics. It also includes a Dolby Vision Gaming mode, which works with low input lag, a big plus for console enthusiasts. Unfortunately, it lacks HGiG, which could further enhance HDR quality in games. Nevertheless, the Hisense U6NQ performs quite well as a gaming television, especially for those who play occasionally and do not require the highest refresh rates in 4K. It is a solid choice for less demanding users.