TCL C655 Pro vs Hisense U6NQ

In the HDR effect quality category, the television TCL 655 PRO shows decent capabilities, achieving 550 nits of peak brightness. This allows for enjoying HDR effects, which can be clearly seen in scenes such as the first one from the movie Life of Pi or the final shot from The Meg. However, the limited number of dimming zones causes some issues. 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 more. The dimming algorithm aims for deep blacks, but at the cost of brightness – which at those moments can cause a drop in brightness of even half. In these more challenging scenes with small elements, it's hard to find any praise, and the HDR effect resembles SDR. Nevertheless, the coverage of the colour palette deserves recognition, which, like in the version without the PRO suffix, is at a very good level.

Hisense U6NQ offers a stable HDR effect, which is a rarity in TVs with local dimming. On most streaming platforms, in films and series recorded in 4K, the TV delivers 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 exhibit distinct differences – some scenes are well-lit, while others are heavily dimmed by dimming algorithms. However, the Hisense U6NQ prioritises maintaining higher brightness, which comes at the cost of blacks, as noted in the paragraph about the contrast test.

The HDR effect on the U6NQ is satisfying, offering a noticeable 'punch' of light in bright moments, although it's worth remembering the aforementioned blooming, which can be visible in challenging scenes. In terms of colour, the TV also performs adequately – the coverage of the DCI-P3 colour gamut is 89%, while BT.2020 is 71%. While these are not results that would impress more demanding users, for beginners in the world of high-quality materials, the U6NQ is a solid choice. As such, 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 colour reproduction. However, even this mode is not free from issues, as we noted in 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 overly emphasise the colour blue. As a result, the image can give a sense of artificial sharpness, which proves to be uncomfortable for the eyes over a longer period. The brightness characteristics also leave much to be desired. The Gamma chart indicates serious difficulties with excessive brightening, making the overall presentation appear washed out. Additionally, the EOTF curve reveals significant problems with reproducing very small elements – they are overly dimmed, as we have detailed in the paragraph regarding HDR effects.

Hisense U6NQ in Filmmaker mode offers really decent colour reproduction, although it's worth remembering that differences between individual units can be noticeable. The model we tested was pleasantly surprising, especially with HD content in SDR quality. The white balance was correct here, and errors in the range of 3–4 ΔE should be acceptable for the average viewer. The television performed slightly worse in reproducing colours with 4K HDR material. The dominance of blue tones led to unnatural cool shades on the Colour Checker chart, giving the image a "store" character. Combined with issues in brightness characteristics – gamma and EOTF curve caused some parts of the image to be too dark – the Filmmaker mode in this case loses some of its credibility. Although the factory settings of the tested unit deserve praise, particularly in SDR, there were still minor shortcomings that would require adjustments to fully utilise the television's capabilities.

After calibrating the TCL 655 PRO television, there is a noticeable improvement in white balance, where the tendency for the screen to be overly pink has been completely eliminated, which was previously noticeable in factory mode. The picture has taken on more natural tones, especially in white and bright elements, which positively affects the overall image perception. Regarding brightness characteristics, the Gamma chart has also improved – the screen is no longer excessively bright, which previously made the image appear washed out. Nevertheless, there are still some issues with the EOTF curve, which are difficult to eliminate due to the television's construction and its limited number of backlight zones. These limitations prevent achieving perfect results in this regard. However, despite this minor fault, the overall effect after calibration is truly outstanding, providing high picture quality and very good colour reproduction.

Although the factory settings of the Filmmaker mode on Hisense U6NQ were quite good, we decided to undertake calibration to fully assess the capabilities of this model. Only after such a procedure can one see how the television performs under 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 adjusting the brightness characteristics – gamma was optimised and no longer causes excessive darkening of the image, which improves its naturalness.

For 4K HDR content, calibration also yielded positive results. We eliminated the issue of blue dominance, which resulted in 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 image darkening in the 10–30% brightness range under laboratory conditions, reveals other shortcomings in real scenes. The television tends to overly 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, arises from the technological limitations of the model and is often difficult to eliminate.

In short: although the Filmmaker mode with factory settings performed decently, calibration allowed us to achieve an even better effect – minor adjustments resulted in a more balanced image, particularly in HDR content. For users seeking the highest quality picture, calibration will be a beneficial step.

The TCL 655 PRO television handles tonal transitions quite well in lower-quality material. The "Gradual Smoothing" feature at low settings effectively smooths tonal transitions, but this comes at the cost of losing some essential details, such as the texture of objects. On the plus side, it doesn't negatively affect film grain, which helps maintain a natural look to the image.

In the context of digital processing, the television adds artificial sharpness. This may appeal to users who prefer a bolder image. However, individuals who favour a softer, more subtle look may find this a drawback. Additionally, a downside is the image cropping due to overscan, which limits the field of view and cuts off the edges of the frame. This can be problematic in certain scenes - for example, news tickers.

With high-quality materials like 4K, tonal transitions on U6NQ look really good – colours blend nicely and the image is consistent. Unfortunately, when we switch to lower resolution content, the television doesn’t offer any extra features that could improve this aspect. An example is the test with the light bulb, where it’s clearly visible that the television struggles with reproducing subtle tonal transitions.

On the other hand, digital processing performs quite well. The image looks lively, is pleasantly soft, and free from excessive artifacts. Moreover, thanks to the sharpness settings, it can be tailored to individual preferences – whether towards a softer or sharper image. Overall, while upscaling lower quality materials could be better, the television handles image processing well.

The TCL C655 PRO television is equipped with a 4K display with a refresh rate of 60 Hz, making it ideal for watching movies. Additionally, the "Flicker Reduction" feature allows for adjusting the smoothness of the picture, giving the user the choice between smoother motion and a cinematic, frame-by-frame effect. Furthermore, the television performs well with lower resolution content, such as Full HD and 2K, offering a refresh rate of 120 Hz, which will surely appeal to gamers who can enjoy a smoother image, albeit at the cost of lower resolution.

Hisense U6NQ offers native refresh rates of 60 Hz at a 4K resolution, but the manufacturer has added a feature that allows for an increase in refresh rate to 120 Hz, at the cost of reducing the resolution to Full HD. This is a solution we have previously seen in TCL televisions, such as C655 or C655 PRO. This gives the user the option – higher motion fluidity or full resolution. This makes sense, especially considering that many new generation console games do not achieve full performance in 4K at 120 Hz.

When it comes to movies, the television is equipped with a motion smoother feature, which allows you to adjust the motion characteristics to your own preferences. This enables a more cinematic effect or increases fluidity in dynamic scenes. Overall, Hisense U6NQ offers sensible solutions in terms of motion fluidity that should satisfy both gamers and movie enthusiasts.

The TCL C655 PRO TV offers an almost perfect set of features for gamers, supporting all key technologies that significantly enhance gameplay comfort. The ALLM feature automatically switches the TV to low-latency mode, improving responsiveness and minimising signal delay – particularly important in fast-paced titles. VRR synchronises the screen refresh rate with the frame rate generated by the console, eliminating screen tearing and ensuring smoother gameplay.

Support for Dolby Vision in game mode enables more detailed colour and contrast representation in games that support this format, while the Game Bar provides quick access to essential settings, such as response time and latency level. Unfortunately, the model does not support 4K resolution at 120 Hz, which may disappoint the most demanding gamers. However, for those willing to forgo 4K, support for Full HD and 2K at 120 Hz offers exceptionally smooth visuals, making it an attractive alternative for high refresh rate enthusiasts.

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