TCL P755 vs Hisense U7S Pro

TCL P755 provides average HDR effect quality. The maximum brightness of the TV is slightly below 300 nits. Such brightness limits the intensity of bright areas in HDR content. In practice, this means that bright elements may not be sufficiently pronounced, affecting the overall impression of contrast. However, the TV offers wide coverage of the DCI P3 colour gamut, reaching about 93%. As a result, colours are vibrant and saturated, significantly improving colour reproduction quality in HDR content. Despite the limited brightness, the wide colour range allows for richer and more realistic shades.

Let's start with the fact that the U7S Pro is an impressively bright television – in calibrated mode, our measurement equipment indicated a staggering 2200 nits of peak brightness! This is an absolutely remarkable result, considering this model is positioned rather as a mid-range option.

However, as we know, peak brightness on test patterns is one thing, and actual movie scenes are another. Unfortunately, in real video materials, the backlight power clearly drops. Admittedly, in the most demanding moments, the television can still exceed the 1000-nit barrier – which is still an excellent result, perfectly aligned with the mastering standards of most HDR films – but the real challenge comes from aggressively tuned local dimming algorithms. Because of these, small bright details, such as stars or the moon in the night sky, become noticeably dimmed. The television tries to maintain deep blacks at all costs, which is of course understandable, but unfortunately, this comes at the expense of the dynamics and brilliance of the HDR effect itself.

It's worth praising the colour reproduction. The new U7S Pro is a QLED type construction that provides a very wide coverage of the colour palette. Unlike last year's model (U7Q Pro), this year's variant is a "true" QLED, not a solution based on a PFS filter. As a result, color saturation has significantly increased, and the coverage of the most demanding BT.2020 space has exceeded the 81% barrier.

The colour reproduction in the P755 in "Cinema" mode, although it is the best factory setting, leaves much to be desired. The biggest issue is the white balance, where the chart clearly shows a spike in the red colour and a drop in the green colour. This leads to a shift in colours towards red, causing the colours on the screen to appear less natural and may look incorrect, especially in scenes with a white or neutral background. This is confirmed by the "Colour Checker" test, which reveals that the colours are indeed shifted towards red, affecting the realism of the image and reducing the perception of colour depth. In terms of contrast, the gamma chart analysis shows significant fluctuations, particularly in the dark areas of the image, where values drop below the optimal level of 2.4. As a result, darker areas may be displayed brighter than they should be. Additionally, the EOTF curve, responsible for brightness reproduction, sits slightly above the reference curve. The graph shows a slight increase in brightness to about 50%, after which there is only a minor drop. This leads to excessive brightness enhancement in the mid-range of the image and may result in loss of detail and distortion in brighter scenes.

We've tested the U7S Pro model – as we always do – in the best factory-tuned picture mode, which is Filmmaker Mode. We can assess the displayed colours in two ways. The most disappointing was the profile intended for watching SDR content, that is, traditional television, YouTube, and other less demanding materials. The picture was clearly too yellow, which was a direct consequence of a poorly set white balance. As our graphs show, there is a huge deficiency of the blue component here, which drastically affected the overall colour temperature. This is clearly evident on the ColorChecker charts and the colour palette graphs, where most samples leaned towards yellow. Fortunately, the factory HDR mode performed much better – there the colour errors hovered around a Delta E value of 3, which is already a really solid result.

After calibration, the colour reproduction on the television significantly improves when it comes to SDR content. The colour curves are now close to the ideal value, and the gamma is more stable. Although the dip at the beginning of the graph to the values is still present, the overall accuracy of colour reproduction is much better. The “Colour Checker” test shows that most colour samples have errors below level 2, indicating improved colour fidelity. A few deviations are present, but generally, the colours are now more realistic and consistent with reality.

Calibration also brings improvements in HDR content. The white balance has been corrected, translating to more natural colour reproduction. The EOTF curve, although now closer to the reference curve, still shows a slight boost in brightness at the beginning of the graph. This leads to minor distortions in very bright scenes, but the overall tonality and detail have been enhanced. Dynamic tone mapping works more effectively, improving image quality in bright areas and preserving more details.

Although the image from the device does not achieve full perfection, calibration brings significant improvement. After adjusting the settings, the television performs much better, offering more realistic and accurate colour reproduction in SDR and HDR content. While some shortcomings can still be noticed, calibration effectively eliminates many previous issues, ensuring better image quality and more natural colours.

We do know, however, that the company Hisense is capable of much more – as previous generations have proven – which is why we simply couldn’t leave the factory flaws of the U7S Pro model unaddressed in everyday content. As always in such cases, we had the television undergo professional calibration. The conclusions? This process brought about a colossal change. After manually adjusting the white balance and compensating for deficiencies in the blue component, the annoying yellow tint disappeared as if by magic. White became naturally clean, and skin tones gained the proper, healthy hue. Importantly, the calibration not only tamed the capricious SDR mode but also maximised the potential of the panel, reducing average colour reproduction errors to values nearly imperceptible to the human eye. The only thing we need to criticise after the whole process is the very nature of the Mini-LED backlighting and its specific interaction with the HDR signal. The aggressively tuned local dimming algorithms significantly interfere with the EOTF brightness curve. As a result, the backlighting doesn’t always work perfectly with the creator’s intent – depending on the scene being watched, the curve can noticeably run either above or below the reference, occasionally disrupting the ideal dynamic of HDR images.

The “Gradual Smoothing” function works quite well, effectively eliminating visible boundaries between different shades of the same colour. Thanks to it, tonal transitions are smoother. Unfortunately, this function is not available in HDR mode, which can affect the quality of tonal gradation in higher dynamic range materials.

In the case of image scaling, the television does not perform its best. There are noticeable edge cut-offs, particularly evident on the model's figure and the branches of trees. The blurring of details in these areas affects the overall sharpness of the image. This may be noticeable when watching content in a lower resolution. Additionally, SD quality image is displayed with slight cropping at the top as well as the bottom.

The digital processing of lower quality signals is at a very high level here, all thanks to the MediaTek Pentonic 800 processor used in the U7S Pro. The upscaling also performs well, which is the TV's ability to enhance lower resolution signals to 4K. We did not notice any unnatural, sharp contours on the screen, and our test image featuring a model simply looked appealing.

The television offers decent, though not perfect, results in terms of motion smoothness. In the case of movies, the television has a "Flicker Reduction" feature that allows for adjustment of motion smoothness on a scale from 1 to 10. With this option, we can tailor the image appearance to cinema or more theatrical preferences (with lower or higher speed).

Hisense U7S Pro uses a panel with a maximum refresh rate of 165 Hz in 4K, and in gaming mode, it can even reach 330 Hz at Full HD resolution. However, it is important to remember that these highest numbers do not have much significance in everyday usage, as most content supports a maximum of 120 Hz (e.g., when playing on a console). Nevertheless, the TV handles motion quite well and performs really well for an LCD construction.

It's hard to fault the fluidity. In the menu, we find a motion smoother called "Motion Enhancement," which has two sliders: motion blur reduction and judder reduction. They allow for manual configuration of the smoother, which works well in both movies and sports, effectively enhancing the raw TV signal.

The device offers a range of features useful for gamers, such as ALLM (Auto Low Latency Mode), VRR (Variable Refresh Rate), Dolby Vision for gamers, and Game Bar. ALLM automatically switches the TV to low latency mode, significantly improving responsiveness to commands from the controller and minimising input lag. VRR synchronises the screen refresh rate with the number of frames generated by the console, eliminating the tearing effect and providing smoother gameplay. Dolby Vision for gamers enhances picture quality by offering better colour and contrast reproduction in games that support this format. The Game Bar feature allows quick access to game settings and monitoring of key parameters such as response time.

However, the TV has some limitations. The 60 Hz panel prevents the display of signals with higher refresh rates at different resolutions, which may affect the fluidity of the image in dynamic games. Additionally, the lack of support for G-Sync technology for PC may impact the quality of gameplay on a computer. It is also worth noting that the HGiG mode, which aims to improve image quality in HDR games, does not work correctly on this model, negatively affecting the visual experience in HDR-supported games.

If you're planning to connect a console or PC to the U7S Pro, you'll be more than pleased – this TV is great gear for gamers. Hisense hasn't held back, featuring 4 HDMI 2.1 ports with full bandwidth of 48 Gbps. So you don't have to juggle cables, as each port will handle the full suite of features. We have an automatic game mode (ALLM) and VRR, which operates over a wide range from 48 Hz to a whopping 330 Hz. Of course, that 330 Hz is currently just a gimmick for owners of powerful PCs, as consoles will cap at 120 Hz, but it's good to have that headroom for the future. The Game Bar also works really well when gaming. It's a handy menu bar for gamers, where you can quickly change the picture mode, turn on a crosshair in the middle of the screen, and even switch the display aspect ratio to ultra-wide, which PC simulation fans will appreciate. The only downside worth noting is the incorrect implementation of the HGiG format in games. The issue is that the TV ignores instructions from the console regarding the image generated in HDR10 and constantly butts in, trying to "enhance" the image in its own way. This makes proper HDR configuration in the console menu (where brightness is set on the logo/checkerboard) a bit more challenging.