Sony X85L vs TCL C6KS / C69KS / Q6CS

The Sony X85L TV offers solid HDR performance with a brightness level of 750 nits, which is sufficient to enjoy vivid effects. In scenes of moderate difficulty, such as the first, third, or fifth test scenes, a brightness of around 600 nits allows one to fully experience the HDR effect. Unfortunately, in more demanding segments, such as the scene from the movie Sicario 2, the TV shows its limitations. Drops in brightness to 250 nits make the HDR effect lose its impressive quality and resemble regular SDR instead. Nevertheless, it is worth highlighting the very good coverage of the DCI-P3 color palette at 95%, which definitely deserves praise and positively affects the overall image quality.

And how does the issue of HDR look? Here the C6KS performs quite well and – as is becoming a recurring theme in this review – identically to the C6K model. The maximum brightness generated by this television is around 600 nits. In bright scenes, this translates to a really solid, cinematic effect, and generally, the video materials look good here. However, one must remember the specifics of the dimming algorithm in this model. When very small, bright points (e.g., stars) appear against a dark background, the television can dim them quite significantly. The goal is simple: to eliminate blooming and maintain the best possible black levels. It’s a reasonable compromise. Most viewers will definitely appreciate deep, “true black” more than additional micro-details that could cause grayness on the screen. Such is the nature of local dimming technology in this price range, and one must be aware of it. It’s also worth noting that the TCL C69KS (C6KS) has an additional PFS coating, which is marketed under the tagline of QLED technology. Thanks to this, the colors are saturated and vibrant – our measurements showed that the coverage of a wide color gamut reaches 92% here.

The Sony X85L television was tested in IMAX Enhanced mode, which, although associated with world-class cinema, does not guarantee an image that aligns with the director's vision. The main issue is the white balance – there is a noticeable strong dominance of blue color and significant lack of red. As a result, the image becomes unnaturally cool and appears artificial. The color reproduction errors were confirmed by the Colour Checker test, which showed significant discrepancies – colors were "scattered" like shots from a rifle, and only a few samples hit the target values. This clearly shows that the precision of color reproduction leaves much to be desired.

The brightness of the image is one of the positive features of the TV. The gamma for HD content is at an acceptable level, although there are minor errors, but generally, it is quite good. However, the brightness characteristics for 4K materials remain an issue, controlled by the EOTF curve. It is evident that very small, bright elements of the image are too dim, which is a result of the limited number of dimming zones due to the design of the television.

Unlike the more expensive C6K model, the tested C6KS does not have an option labeled Filmmaker Mode in the menu. Is this a reason to cry? Absolutely not. Our tests have shown that in practice, in terms of color reproduction, the absence of this specific label makes virtually no difference. The best available Film/Cinema mode here offers nearly identical picture characteristics to the aforementioned Filmmaker mode in the more expensive model. So we get a very similar image, just under a different name. So if you were wondering whether paying extra for the C6K gives you better colors – the answer is: no, in both cases the base is the same and requires slight adjustments.

Thanks to the use of calibration tools offered by Sony X85L, the image quality has been significantly improved. After calibration, the white balance for HD content is much more stable, making colors look more natural and the image gains authenticity. Although it is not perfect, these changes allow viewers to enjoy a more realistic representation of colors, eliminating the earlier cool tone. The gamma, which already performed decently, has been adjusted to an even better version. As a result, tonal transitions and brightness are more consistent, positively affecting the depth and detail of the image.

As for 4K content, despite efforts, the white balance still struggles with a deficiency of red, which can result in overly warm colors in some scenes. Synthetic tests showed that the EOTF curve in HDR is quite stable, with a slight boost in mid-bright scenes. However, in real film materials, the TV can still be too bright with fine, light details, which is a result of the limitations of large local dimming technology.

Nonetheless, calibration has brought significant benefits, particularly in color accuracy, improving overall image quality and providing a more natural and cohesive directorial vision.

Thanks to the white balance adjustment, the tendency of the C69KS to distort colors has been effectively reduced, leading to a very good final effect. After calibration, we won't see excessive warmth in SDR scenes or overly cool tones in HDR. However, it's worth noting the brightness characteristic. In SDR content, there are hardly any objections – the image looks very good, especially in older films, television programs, or materials from YouTube. It is much more difficult to evaluate the performance of the television in HDR. Analysis of the EOTF curve suggests correct behavior, but its practical variant shows certain limitations. The C69KS can overly brighten the smallest elements of the frame, while at other times it can dim the entire scene. Calibration has therefore brought clear benefits in terms of color reproduction, but certain limitations arising from the operation of local dimming and the way it is controlled by the C69KS cannot be avoided, as we also saw in the C6K test.

In terms of smoothing tonal transitions, the Sony X85L television does not offer any dedicated enhancement options, which is a downside. On the other hand, image scaling performs quite well – the television adds a bit of artificial sharpness, which can make details such as tree branches more pronounced, although sometimes with noticeable jaggedness. This type of effect may appeal to some viewers who prefer a more detailed image.

C69KS handles upscaling quite well. The tested 576p material looks surprisingly decent – a significant amount of detail is preserved, and the algorithm adds a subtle "rounding" effect to sharp edges, making the image appear more cohesive. However, the smoothing of tonal transitions is lacking. The television practically cannot improve them, leaving the image in a somewhat raw state. With older materials, this can be simply exhausting, as the lack of additional processing highlights all imperfections.

The Sony X85L, equipped with a 120 Hz panel, will meet the expectations of a wide range of users – from sports and gaming fans to movie buffs. Movie enthusiasts will surely appreciate the presence of one of the best motion smoothing systems, Motionflow. This system offers adjustment via smoothness and clarity sliders – smoothness is responsible for motion fluidity, eliminating stutter, while clarity enhances the sharpness of fast scenes, reducing blur.

C69KS offers a simplified motion improvement panel in movies, allowing you to adjust the intensity of the effect using a slider. This makes it easy to match the smoothness to your own preferences. The possibility of using higher refresh rates is also a plus – even though the panel operates natively at 4K at 60 Hz, lowering the resolution to 1440p allows you to enable 120 and 144 Hz modes, both on consoles and PC. This sounds like great news, but in practice, the image at these settings suffers from significant motion blur. The effect is noticeable enough that the overall experience feels simply mediocre and loses its appeal in everyday use.

Sony X85L offers quite a solid set of features for gamers, making it an attractive choice for gaming enthusiasts. First and foremost, the TV has a 120 Hz panel, translating to smooth and dynamic image display, ideal for both fast-paced action games and more demanding sports titles. It is equipped with two HDMI 2.1 ports with full bandwidth of 48 Gb/s, allowing for the full utilization of next-gen console capabilities. Additionally, the Sony X85L supports VRR (Variable Refresh Rate) technology, which helps reduce stuttering and artifacts during gameplay, providing a fluid experience. The TV also supports G-Sync, which is particularly beneficial for gamers using NVIDIA graphics cards, allowing for screen refresh rate synchronization with GPU performance, eliminating the tearing effect. It is worth mentioning the Game Bar feature, which facilitates quick access to essential gaming-related settings such as VRR, brightness levels, and display modes, making it convenient and useful during gameplay.

However, there are certain limitations. The TV does not support HGiG, which may be a downside for some gamers, as HGiG optimizes HDR effect rendering in games, providing a more authentic visual experience. Additionally, while Dolby Vision mode is available, it is not practical for gaming due to very high input lag.

If we overlook the smearing and lack of native 4K at 120 Hz, the C69KS impresses with how well it performs during gaming. We get everything you can expect from a gaming television: variable refresh rate (VRR), automatic switching to game mode (ALLM), Dolby Vision Gaming mode, and a reasonably functioning HGiG. The TV can also operate at 120 and even 144 Hz at lower resolutions, allowing for smoother gameplay on console or PC. Additionally, there is a clear Game Bar that lets you quickly glance at key settings during gaming. As a result — despite a few limitations — the C69KS can be a truly successful screen for gamers.