TCL C655 / C69B (55"-85") vs Samsung DU7192 (VA)

Generally speaking, the quality of the HDR effect on the TCL C655 / C69B looks quite promising. The average value in the test charts is around 450 nits, which already allows one to feel the light effects and better image dynamics. However, as previously mentioned, this effect may be partially subdued by slight differences in bright and dark colours, resulting from the lack of local dimming technology. However, the coverage of the DCI-P3 colour palette at 94% deserves high praise, and this is made possible by the use of a quantum dot (QLED) matrix. As a result, colours are vivid and accurately represented when watching HDR content.

In the luminance charts, the peak brightness of the television is around 280 nits. Unfortunately, this value is too low to fully enjoy HDR effects, which require significantly higher luminance. In the tested materials, such as The Meg and Gemini Man, the lack of adequate brightness severely limits the magic of HDR, and the details in the brighter parts of the image are not sufficiently highlighted. For users primarily consuming SDR content, this level of quality may be acceptable, but it is definitely not enough when it comes to HDR. Additionally, the coverage of the DCI-P3 colour palette at 82% does not favour presenting HDR content in its full glory. The limited colour gamut makes it difficult for the television to reproduce vibrant and diverse colours, which is crucial for achieving a cinema-like experience.

The television TCL C655 / C69B offers a film mode that has been tested for colour reproduction quality. Although this mode is called film mode, it unfortunately has several errors that a director would surely not want to see when recording their work. Starting with image analysis, it is 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, causing the colours to be too warm, and the overall result takes on a pink or yellow tint. This can be seen in the image below from the film "Star Wars". The Colour Checker test confirms these errors – the colour samples veer into incorrect shades, affecting the overall colour fidelity. A less significant issue is the brightness characteristic. However, this is also not without its flaws. The gamma graph shows a strong peak at the beginning, causing the image to be excessively brightened, and the EOTF curve responsible for brightness in 4K HDR material also has substantial fluctuations – it is noticeable how the television tries to maintain the appropriate brightness, but it does not always succeed effectively.

The best factory mode we relied on during testing turned out to be "Filmmaker". Although this mode is the closest to the creators' intent for films, it is not without certain imperfections. The white balance chart in both SDR and HDR clearly shows a dominance of red, resulting in significant yellowing, particularly noticeable in whites and on actors' faces. In HDR mode, there is also a slight dominance of green, which, however, does not have as much impact on the perception of the image. The gamma, which is responsible for brightness in SDR materials, performed quite well, but with one serious caveat. In the darkest parts of the image, it was too low, causing excessive brightness in those scenes, depriving the film of drama and contrast. For HDR, the white balance remains at a similar level; however, the EOTF curve chart draws attention. At the beginning, the curve clearly bulges, leading to a strong brightness in the darkest scenes. Then the result suddenly drops below the reference line, resulting in an overly dark image and a loss of dynamics in the brighter parts.

In summary, the "Filmmaker" mode, despite its advantages, requires refinement – especially regarding white balance and proper management of brightness in the darkest and brightest parts of the image. In its current form, it may be acceptable for less demanding users, but for viewers expecting precise image reproduction, it may leave much to be desired.

After calibrating the television's film mode TCL C655 / C69B , the white balance has been adjusted, and the colours are presented as they should be – confirmed only by slight deviations in the Colour Checker test. The gamma is really quite accurate, which means the television should not have issues 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" more in a given area of the screen. Despite this inherent limitation that cannot be bypassed, we recommend adjustment in the settings, as the overall colour presentation looks really very good.

Even for its lower models, Samsung offers advanced image calibration tools, which allow for significant improvement of the factory settings. We undertook this task, and the results turned out to be more than satisfying. The white balance, which previously exhibited a strong yellowish tint in both SDR and HDR, was significantly improved. Although slight deviations from the norm can be noticed, the overall effect is much cleaner and more natural than before calibration. As a result, whites and skin tones look much better. We also managed to properly shape the gamma in SDR materials, which allows for achieving the maximum contrast that this television can offer. The EOTF curve, responsible for HDR materials, was also improved – the image is no longer brightened or darkened as drastically as it was before calibration. Despite these successes, HDR materials still struggle with high deltaE error values. The main reason lies in the limited brightness of the television, which does not allow for a complete representation of the dynamics of HDR content. Nevertheless, after calibration, the image is clearly better and more aligned with the creators' intentions. For users seeking the best possible quality in this class of equipment, calibration is definitely recommended.

The television TCL C655 / C69B handles tonal transitions fairly well in low-quality materials. The "Gradual Smoothing" feature at a low setting effectively smooths out tonal transitions; however, it simultaneously blurs significant details, such as the texture of objects. On the plus side, it does not negatively impact the film grain, allowing the natural appearance of the image to be preserved. As for digital processing, the television adds artificial sharpness, which may appeal to some users who prefer a sharpened image. However, for those who prefer a softer look, this could be a disadvantage. A notable downside is that the image has been quite significantly cropped due to what is known as overscan, which reduces the field of view and trims the edges of the image.

The tonal smoothing function operates in two modes – "off" and "auto". Turning it off causes gradation issues, while the "auto" mode ensures smooth transitions, but at the cost of grain and detail, which are often blurred. Due to these limitations, we do not recommend using this feature, as confirmed by our tests conducted with it turned off.

Scaling of lower resolution materials in this model is not impressive. Details are blurred, and the edges of objects may contain artifacts. This limitation makes the television perform better with higher resolution content.

The television C655 / C69B is equipped with a 4K@60 Hz panel, which means it works best for watching films and less dynamic content. It also features a "Flicker Reduction" function that allows for the adjustment of image smoothness – the user can choose whether they prefer smoother motion or a more cinematic, frame-by-frame effect. The television can also adapt to lower resolutions, such as Full HD and 2K at 120 Hz, which will surely please gamers by offering a smoother image at the cost of resolution. It is worth noting that this feature is available in sizes from 55"+. Additionally, the largest variant, 98", is equipped with a 144Hz panel with full motion smoothing.

Although the Samsung DU7192 is the lowest model in the manufacturer's range, it is equipped with motion smoothing technology. While the functionality of this solution is significantly limited compared to more expensive models, its presence alone distinguishes the television amidst competitors in this price bracket. The TV supports a maximum refresh rate of 60 Hz, which is sufficient for comfortable viewing of films and series, but may be inadequate for dynamic content such as sports. In the motion smoothing menu, we can find, among other things, the "Judder Reduction" feature. Unfortunately, its performance leaves much to be desired – regardless of the setting, the picture exhibits the characteristic stutter known from materials recorded at 24 frames per second, making this feature practically ineffective.

The TCL C655 / C69B television offers nearly the perfect set of features for gamers, supporting all the most important technologies. It has an ALLM feature that automatically switches the TV to low latency mode, significantly improving responsiveness and minimising signal lag, which is especially important during dynamic gameplay. The VRR feature allows the screen refresh rate to synchronise with the frame rate generated by the console, eliminating screen tearing and providing smoother gameplay.

The television also supports Dolby Vision in game mode, which ensures better colour and contrast rendering in games that support this format, and the Game Bar provides quick access to settings related to gameplay, such as response time, latency level, and other parameters. Unfortunately, the C655 / C69B does not support 4K resolution at 120 Hz (the exception here is the 98" variant), which may be disappointing for more demanding gamers who expect the highest fluidity of image in high-resolution games. However, if we can forgo 4K, the television offers support for Full HD and 2K at 120 Hz, providing a smoother image and is a great alternative for those who prefer a higher refresh rate at the expense of resolution.

Samsung DU7192 is equipped with HDMI 2.0 ports, which is expected in this price range. This limitation means there is no support for the full capabilities of the latest generation consoles, such as VRR technologies. The television only offers a basic feature for gamers – automatic switching to low latency mode (ALLM), and support for basic HDR for games in the HGiG standard. HGiG allows for the display of HDR content in games according to manufacturers' guidelines; however, the limited brightness of the television does not allow for full enjoyment of the effects that this standard offers. Unfortunately, there is a lack of conveniences such as GameBar, which is increasingly found even in cheaper models and greatly facilitates quick adjustment of settings for games. The presence of this feature could significantly enhance user comfort, especially for those who frequently change display modes.