TCL C855 vs TCL C655 / C69B 98'

TCL C855 delivers a highly varied HDR effect. On one hand, the television truly shines, while on the other, it resembles a lower model with FALD backlighting. This situation is, however, regularly observed in this brand, so it was not a surprise to us. The first and last scenes, featuring large elements of light, look almost phenomenal, "shining" with brightness levels of 1470 and 1820 nits respectively. Such effects will certainly cause more than one person to squint, while simultaneously feeling the extraordinary dynamism of the scene itself. You can truly feel as if you are inside the film. The situation changes dramatically when small or minor elements with high luminance surrounded by black appear on the screen. The TCL C855, in order to avoid the halo effect, significantly reduces brightness to a level of even 240 nits, which is a disappointing result, causing the film to not appear as if it was recorded in HDR. The HDR effect in the TCL C855 makes watching dynamic scenes more engaging, allowing the viewer to feel as though they are part of the action. Even with smaller elements of high luminance, the television manages to maintain details without excessive dimming. Moreover, the TCL C855 test shows that the brightness of the image is adjusted for scenes with a large amount of detail, which enhances viewing comfort.

The quality of HDR effect on the TCL C655 / C69B looks quite promising. The average value in the test charts is around 450 nits, which already allows for a hint of the brilliance of light effects and better image dynamics. However, as previously mentioned, this effect can be somewhat subdued by slight differences in bright and dark colours, resulting from the lack of local dimming technology. Nevertheless, the DCI-P3 colour gamut coverage of 94% deserves high praise, and this is made possible by the use of a quantum dot (QLED) panel. As a result, colours are vibrant and well-rendered when watching HDR content.

The best factory mode for the TCL C855 is "Film," and it is on this mode that we conducted all our tests. Like any mode predefined by the manufacturer, it had its drawbacks that are worth correcting to achieve an image as close as possible to what the film producer intended. We will examine the colour characteristics in both SDR and HDR materials. Looking at the first, we see a noticeable dominance of green in the white balance, which, as you might imagine, resulted in an unpleasant greenish tint across the entire image. Observing the very important gamma chart, which is responsible for the image's contrast, we see a significant deviation from the reference line marked at 2.4. From the left, we can observe a strong spike in the measured value, which at this point caused the image to be overly contrasted, merging details into a dark blob. This situation persisted for quite some time, up to 20% of the chart's value, before then dipping below the reference. This, in turn, meant a brightening of the image and a significant drop in contrast. The factory mode performed slightly better in HDR materials, as the white balance looked quite good, except for the second half, where green once again took precedence. Looking at the EOTF curve, which, unlike gamma, shows the rate of brightness increase, we see primarily two errors: the darkest scenes were too dark, and the brightest ones were overexposed. This was something we could also observe in the scene from the film "Pan" in the paragraph checking the TV's HDR.

The TCL C655 / C69B television offers a film mode that has been tested for colour reproduction quality. Although this mode is called film mode, unfortunately, it has many errors that the director would certainly not want to see when recording their work. Starting with image analysis, it's worth examining the white balance – both in HD and 4K HDR content, the white balance has significant errors. In both cases, the red colour dominates, making the colours too warm, and the overall image takes on a pink or yellow tint. The Colour Checker test confirms these errors – the colour samples stray into incorrect shades, affecting the overall colour fidelity. A minor issue is the brightness characteristics. However, this too is not without flaws. The gamma graph shows a strong spike at the beginning, which can cause the image to be excessively brightened, and the EOTF curve responsible for brightness in 4K HDR materials also has significant variations – it is evident how the television tries to maintain the appropriate brightness, but it does not always manage to do so effectively.

TCL, like the vast majority of manufacturers, provides advanced calibration tools in its televisions. Here we find 2- and 20-point adjustments for greyscale as well as an advanced colour management system. The results, as you can see, are very good, and in SDR materials we have significantly approached the reference image. We eliminated both the green tint and the gamma issue, although there is still a slight "kink" at the very beginning. The performance with HDR materials was somewhat poorer, as the TCL C855 did not allow us to model them adequately. We were only able to slightly adjust the EOTF curve and significantly improve the colours themselves.

After calibrating the television's movie mode TCL C655 / C69B , the white balance has been adjusted, and the colours are displayed as they should be – which is confirmed only by slight deviations in the Colour Checker test. The gamma is really correct, which means the television shouldn't have problems with brightness in low-resolution materials. Unfortunately, a similar EOTF characteristic is still visible, which is a natural phenomenon in televisions that do not have local dimming – they simply struggle to "shine" stronger in a given section of the screen. Despite this design limitation, which cannot be bypassed, we recommend adjustment in the settings, as the overall coloration looks really very good.

Once again, we will take a look at the function of smoothing tonal transitions, but this time also at image scaling. The latter is particularly important when watching lower-quality materials, such as certain television programmes or older films. We will focus on the function responsible for tonal transitions. Interestingly, just like in the scenes of the previous test, it performed excellently and smoothed out practically all the inconsistencies; however, here it had problems. Using the menu responsible for this function, we found that no setting - even the strongest - was of any help.

Image scaling in TCL C855 is described as one of the best we have had the opportunity to test so far. The image is sharp, but in a way that could be described as natural for our eyes. Even the small, fine branches do not have jagged edges, and there is no white halo around figures, which is characteristic of inferior scaling systems.

The TCL C655 / C69B television handles tonal transitions in lower quality materials well. The "Gradual Smoothing" function, at its lowest setting, effectively eliminates visible banding, but at the same time causes a loss of detail, for example, in the texture of objects. The advantage is that it does not interfere with film grain, allowing the image to maintain a natural appearance.

In terms of digital processing, the television adds a considerable amount of artificial sharpness, which may appeal to those who prefer a crisp image. For those who favour a more subtle representation of details, this could be a downside. Another drawback is the rather aggressive overscan – the image gets cropped, leading to the loss of portions at the edges and limiting the field of view.

The maximum refresh rate we can set on the TCL C855 is 144 Hz. Naturally, this is only possible by connecting the TCL C855 television to a very powerful PC. Otherwise, we will be operating at a maximum refresh rate of 120 Hz, which is recommended if we primarily want to watch sports or content with a lot of motion dynamics. For those requiring high image fluidity, the manufacturer has implemented a multi-stage motion smoother. This has been divided into two separate sliders regulating the sharpness of moving images (Motion Blur Reduction) and flicker (Flicker Reduction). Both sliders can be set in the range from 0 to 10, with each increment affecting the level of smoothing, so everyone can find their sweet spot. We present a setting that allows for slight smoothing without the soap opera effect.

The panel of the TCL C855 features a very good response time. This is particularly important as VA panels often have issues with so-called ghosting, which is the effect where a black halo can be seen behind a fast-moving object.

Unlike smaller versions, the 98” model stands out with significantly better motion fluidity. Instead of the standard 60 Hz, this colossal screen is equipped with a full-fledged 144 Hz matrix, which opens up entirely new possibilities – both for gamers and movie lovers. Thanks to the full motion smoother, the television provides incredible image fluidity, eliminating motion blur and enhancing the viewing comfort of dynamic scenes. It is worth noting that this technology works across the full refresh range, meaning that there is no need to compromise between fluidity and quality. Additionally, the "Flicker Reduction" function allows you to adjust the fluidity to your own preferences – you can opt for a more cinematic effect with visible frames or an extremely smooth image.

The TCL C855 television is equipped with full HDMI 2.1 connectors with a full bandwidth of 48 Gb/s. During our tests, we confirmed the seamless operation of all functions that are part of this standard. As can be seen, all checkboxes light up green, which will certainly be appreciated by gamers, both console and those using the television as a monitor for their computer. Additionally, the TCL C855 supports both AMD FreeSync and NVIDIA's G-Sync, which can be easily activated in the graphics card settings. Those with a very powerful setup can send a 144 Hz signal to the C855, which this television handles effortlessly. It is also worth mentioning the implementation of the HGIG mode, which, however, due to the flaw of the “Game” mode, is overly brightened, making it difficult to configure properly on screen. Fortunately, the television performs excellently with the Dolby Vision format.

The TCL C855 is one of the first manufacturers to equip its televisions with a special GameBar, which allows for extensive setting changes on the fly, without the need to exit the game. It features functions such as an additional crosshair grid, black level correction, and settings for people with disabilities. In the picture, we can see the next generation of this solution.

In summary, the TCL C855 television will be an ideal solution for those seeking a screen for all sorts of electronic gaming. Thanks to all the features supporting such entertainment, it is incredibly engaging. It is also important to highlight the very low input lag, regardless of the selected settings, including with the HDR Dolby Vision format.

The 98-inch TCL C655 / C69B is excellently equipped for gamers. Full HDMI 2.1 ports and a 144 Hz panel allow for gaming in 4K at 120 Hz, providing fluidity and responsiveness that will impress even the most demanding.

The television supports Variable Refresh Rate (VRR), eliminating screen tearing, while the Automatic Low Latency Mode (ALLM) ensures that the game starts immediately without the need for manually switching settings. There is also support for Dolby Vision and HGiG, making the image quality in games even better – details are sharp, colours are natural, and contrast is perfectly balanced.

Additionally, the television offers a dedicated gaming panel that allows for quick adjustment of picture settings without the need to exit the game. It is a device that meets virtually all the requirements of a modern gamer.