TCL C855 vs LG QNED80A6A (IPS)

The TCL C855 delivers a highly varied HDR effect. At times, the television truly excels, while at other moments, it appears reminiscent of a low-end model equipped with FALD backlighting. Inconsistency is frequently found with this brand, so it didn’t come as a surprise. The first and last scenes, which feature large light elements, are nothing short of spectacular, boasting brightness levels of 1470 and 1820 nits, respectively. Such brightness can make viewers squint their eyes, allowing them to feel the extraordinary dynamism of the scene. It genuinely immerses the audience, creating a sensation of being inside the movie itself. However, the situation shifts dramatically when small or subtle elements with high luminance appear against a dark background. In these instances, the TCL C855 significantly reduces brightness to levels as low as 240 nits to mitigate halo effects. This reduction is disappointing, as it can make the movie appear as if it was not filmed in HDR. Despite these shortcomings, the HDR effect on the TCL C855 enhances the viewing experience during dynamic scenes, making it feel more engaging and allowing the viewer to feel part of the action. Even with smaller high-luminance elements, the television retains details without excessive dimming. Additionally, the TCL C855 adjusts image brightness according to scenes with rich detail, further enhancing viewing comfort.

When it comes to image dynamics and brightness, the QNED80A has its feet firmly on the ground. It is not a "light beast" – during our measurements, peak brightness oscillated around 350-400 nits. To put it plainly: these are values that will not allow HDR formats to fully spread their wings. So don’t expect the glare of the sun or car headlights in movies to blind you. However, this TV has a powerful ace up its sleeve that saves the overall view of the image – it is the colors. LG engineers have implemented an advanced filtration system here (technically likely based on a PFS phosphor, marketed as QNED/NanoCell), which does a fantastic job. Thanks to it, despite the average brightness, the screen can generate exceptionally saturated and pure colors. Our instruments showed coverage of the wide DCI-P3 cinema palette at the level of 93-94%. This result outclasses most standard LCD TVs. In practice, this means that when watching 4K HDR content, the image – while not particularly bright – is very plastic, vibrant, and pleases the eye with the depth of colors.

The best factory mode for the TCL C855 is the "Film" setting, and all our tests were conducted using this mode. However, like many predefined modes, it has flaws that should be addressed to achieve an image closer to the producer's original vision. In our examination of the colour characteristics for both SDR and HDR materials, issues were found.

Focusing first on SDR content, there is a noticeable dominance of green in the white balance, which leads to an unpleasant greenish tint across the entire image. The gamma chart, crucial for image contrast, shows a significant deviation from the reference line marked at 2.4. Initially, there is a pronounced spike in the measured value, resulting in an over-contrasted image where details can merge into a dark blob. This condition persists for nearly 20% of the chart before it dips below the reference line, causing the image to brighten and resulting in a substantial drop in contrast.

In HDR materials, the factory mode performs somewhat better; the white balance appears more balanced overall, although the green tint resurfaces in the latter half of the spectrum. When we look at the Electro-Optical Transfer Function (EOTF) curve—unlike gamma, which reflects contrast—we identify two main errors: the darkest scenes are too dark, while the brightest ones become overexposed. This discrepancy was evident in our review of the scene from the movie "Pan," further illustrating the TCL C855's HDR performance issues.

Here, regardless of whether you encounter the VA or IPS version, the situation looks identical. LG engineers once again served us their vision of a "gaming look," which unfortunately has little to do with accuracy. After switching to console, the white balance automatically drifts into very cold areas. The image is dominated by the color blue, making it seem artificially sharpened, and the white is so aggressive that it is almost burned out. This creates an effect that we associate with bright retail modes – everything is supposed to shine and scream "I am digital." While some may like this, we must say it straight: this is not an accurate image. If you care about naturalness, we suggest checking the settings right away and changing the color temperature to a warmer one.

TCL, like most manufacturers, offers advanced calibration tools within its televisions. These include both 2-point and 20-point adjustments for grayscale, as well as a comprehensive colour management system. As a result, we achieved impressive results in SDR materials, bringing the image significantly closer to the reference standard. We successfully eliminated both the green tint and the gamma issue, although a slight "kink" at the very beginning of the gamma curve still persists.

In contrast, the situation with HDR materials was less favourable, as the TCL C855 did not allow for precise modelling. We were only able to make minor adjustments to the EOTF curve while significantly enhancing the overall colour accuracy. This limitation suggests that while calibration tools are effective, they may require further refinement for optimal HDR performance.

After professional calibration, the QNED80A in the IPS version has changed beyond recognition, especially in "regular" content (SDR). We managed to eliminate the greenish tint and calm down the overly bright gamma. In classic television or older games, color errors (DeltaE) fell below the threshold of perceptibility (value < 2). The image is now consistent, natural, and truly pleasing to the eye. The situation is somewhat more complicated in HDR mode. Although the colors are already in place, the television has trouble perfectly controlling the brightness (EOTF curve). Due to the limitations of edge lighting and the rather poor adjustment options provided by LG in this area, the television's software sometimes "does what it wants" just to mask the imperfections of black and contrast. However, this is not a cause for concern – despite these technical limitations, the image after calibration is a class better than what you saw out of the box.

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

Image scaling in TCL C855 is defined 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 to our eye. Even small, fine branches do not have jagged edges, and there is no white halo around figures, a characteristic of weaker scaling systems.

It often happens that cheap 4K TVs mercilessly expose the flaws of low-resolution materials. Here, it's different. The QNED80A is great equipment for watching content that isn't perfect. The processor does a great job of upscaling the image, making even older recordings look quite decent on a 4K screen – they are consistent and free of digital noise. An interesting feature is the gradation reduction available in the settings. It is quite effective in combating so-called banding (color banding) in low-bitrate materials. Of course, one should approach it with some caution. Due to the lower computing power of the chip (compared to the premium series), enabling this option can sometimes result in unwanted artifacts or blurriness. Despite this risk, we encourage experimentation, as in many cases this feature can save a poor-quality viewing experience.

The maximum refresh rate you can set on the TCL C855 is 144 Hz. Naturally, this is only possible after connecting the TCL C855 TV to a very powerful PC. Otherwise, we will be operating at a maximum refresh rate of 120 Hz, which is recommended if we want to watch primarily sports or materials with a lot of motion dynamics. For those who require high image fluidity, the manufacturer has implemented a multi-stage motion smoother. It is divided into two separate sliders which control the sharpness of moving images (Motion Blur Reduction) and flicker (Flicker Reduction). Both sliders can be adjusted from 0 to 10, with each level affecting the degree of fluidity, so everyone can find their sweet spot. We present a setting that allows for slight smoothing without the soap opera effect. The matrix of the TCL C855 features a very good response time. This is particularly important since VA panels often struggle with the so-called ghosting effect, where a black halo can be observed behind a fast-moving object. where a black halo can be observed behind a fast-moving object.

In terms of motion reproduction, the QNED80A unfortunately has a tough time. The television is based on a 60Hz refresh rate panel, which in 2025 in the QNED series is quite a disappointment. If you are looking for perfect sharpness in dynamic soccer matches, you might feel a bit unsatisfied. A solution in this situation is the TruMotion system. It allows for artificially adding frames, which smooths out the image in movies and series. In the menu, you will find the De-Judder slider – we recommend setting it to a value of 2, 3, or 4. This is the "golden mean" that improves fluidity without turning the film into a soap opera.

The TCL C855 TV has fully-featured HDMI 2.1 ports, boasting a full bandwidth of 48 Gb/s. During our testing, we confirmed the seamless operation of all functions included in this connection standard. As highlighted, all checkboxes are illuminated in green, a feature that will undoubtedly be appreciated by gamers, whether on consoles or those using the TV as a computer monitor. 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 powerful configurations can feed a 144 Hz signal to the C855, which handles this effortlessly. It is also worth noting the implementation of the HGIG mode, which can be excessively bright due to the shortcomings of the "Game" mode, making proper configuration on the screen challenging. Fortunately, the TV excels with the Dolby Vision format.

TCL, as one of the pioneering manufacturers, has equipped its televisions with a special GameBar, allowing for extensive adjustment of settings "on the fly" without the need to exit the game. This feature includes options like an additional crosshair grid, black level correction, and settings designed for individuals with disabilities. The image showcases the next generation of this solution.

In summary, the TCL C855 TV is an ideal choice for those seeking a screen for all forms of electronic gaming. With comprehensive features supporting such entertainment, it provides an extremely engaging experience. It is also important to emphasise that it maintains very low input lag, regardless of the selected settings, including when using the Dolby Vision HDR format.

In the gaming section, we won't sugarcoat it for you – the QNED80A is not e-sports equipment. The lack of support for 120Hz signal is a fact that must be accepted. However, LG engineers have done everything to squeeze the maximum potential out of this 60 Hz panel, providing gamers with a set of desired features. First and foremost, the television supports VRR (in the range of 48-60Hz) and ALLM. This means that the image is smooth, does not stutter, and the television automatically switches to low latency mode as soon as we pick up the controller. Accessing these options is incredibly simple thanks to the dedicated system overlay – Game Dashboard. It is also worth appreciating the support for the HGiG format. This is a nod to owners of modern consoles. Although the screen does not support gaming Dolby Vision, HGiG ensures that the television "understands" how to display games in HDR. This helps us avoid the issue of blown-out clouds, which is unfortunately a plague on cheaper LCD televisions.