TCL C9K vs LG QNED80A6A (IPS)

As we mentioned regarding black levels and contrast – the C9K can make a huge impression in synthetic tests. Our measurements showed that on a screen 10% filled with white, the television can achieve... 4000 nits of brightness! It sounds out of this world, but – and here's where the pattern unfortunately repeats – the numbers say one thing, and the practical experience says another. In real movie scenes, the situation looks different. In the best-case scenario, when light effects occupy a large part of the image and the local dimming algorithm doesn't have to ponder too much about what to do with thousands of zones, the effect is really quite good. At that point, the C9K can hit around 1500 nits, which delivers a pleasant, intense burst and can indeed leave a positive impression.

The problem arises with smaller elements – such as stars in the sky, the moon, or individual reflections. That's when the proverbial cat comes out of the bag: the algorithms are not yet refined, and brightness drops to as low as 400–500 nits. That's a huge difference from the potential 4000 nits we saw in lab tests. Why does this happen? Most likely, the television is trying to protect the black levels in this way and minimize the halo effect around bright objects. Unfortunately, this comes at the expense of detail – some details simply vanish, and the scene loses its nature.

When it comes to image dynamics and brightness, the QNED80A keeps its feet firmly on the ground. It’s not a "light beast" – during our measurements, peak luminance hovered around 350-400 nits. To put it bluntly: these are values that won't fully unleash the potential of HDR formats. So don’t expect the glare of the sun or car headlights in films to blind you. However, this television has a powerful ace up its sleeve that saves the overall image quality – it's the colours. LG engineers have employed an advanced filtration system (technically based on phosphor PFS, marketed as QNED/NanoCell), which does a fantastic job. Thanks to this, despite average brightness, the screen can generate exceptionally saturated and pure colours. Our instruments showed coverage of the wide cinematic DCI-P3 colour gamut at around 93-94%. This is a result that outclasses most standard LCD televisions. In practice, this means that when watching 4K HDR content, the image – although not very bright – is very vivid, lively, and delights the eye with its depth of colours.

For colour tests, we once again reached for the Filmmaker mode – a new feature in TCL televisions for 2025. While the direction is a step in the right way, the execution leaves a lot to be desired. The white balance in SDR content turned out to be too warm – there was an excess of red. On the other hand, in HDR, it swung in the opposite direction: the image became excessively blue. The Colour Checker test revealed quite a few colour inaccuracies that were noticeable to the naked eye. An even bigger problem turned out to be what we mentioned above – brightness management. Regardless of whether we were watching SDR or HDR content, the image tended to wash out the entire scene, giving it an unnatural, almost grotesque character. Therefore, it’s hard to call this a "director's mode" – because no director has ever seen such an image.

Here, regardless of whether you come across the VA or IPS version, the situation looks identical. LG engineers have once again served us their vision of a "gaming look," which unfortunately has little to do with accuracy. When switching to a console, the white balance automatically shifts to very cold regions. The image is dominated by blue, making it seem artificially sharpened, and the white is so aggressive that it almost burns out. This creates an effect we associate with garish retail modes – everything is meant to shine and scream "I’m digital." While some may like this, we must say it bluntly: it is not an accurate image. If you care about naturalness, we suggest you immediately check the settings and change the colour temperature to a warmer one.

After calibration, we finally managed to tame the white balance – and it immediately translated into a more natural image. Colours finally started to look as they should, and the overall presentation was incomparably better than on the factory settings. In other words – it’s worth taking a moment to improve this, as the gain is really significant. The gamma responsible for brightness management also managed to be brought into order in SDR content, and the effect was more than satisfactory. Unfortunately, when we turned on HDR materials, the situation quickly became complicated. No matter how we set the local dimming, the television had a tendency to do what it liked with the image – either it overexposed everything or darkened the darkest parts too much. Just like we saw in the scene from the movie Billy Lynn. Colour-wise, the improvement after calibration makes a great impression, but brightness management in HDR remains the Achilles' heel of the C9K and presents a certain technological limitation.

After professional calibration, the QNED80A in the IPS version has changed beyond recognition, especially with "ordinary" content (SDR). We managed to eliminate the greenish tint and calm down the overly bright gamma. In classic television or older games, colour errors (DeltaE) have fallen below the threshold of perception (value < 2). The image is now coherent, natural, and truly pleasing to the eye. The situation is somewhat more complicated in HDR mode. Although the colours are now in place, the TV struggles with perfect brightness control (EOTF curve). Due to the limitations of edge lighting and the rather poor adjustment options provided by LG in this area, the TV's software at times "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 above what you saw out of the box.

Digital image processing on the TCL C9K is rather average. The smooth tone transition feature seems to be present, but activating it practically changes nothing – colour bands are still visible, and it can unintentionally highlight elements we’d rather keep hidden, such as object textures. Fortunately, it doesn’t remove film grain, but that’s poor consolation given that the effects are still meagre. It’s therefore hard to recommend using this option.

On the other hand, image scaling presents itself much better. Lower quality materials look quite decent – characters and backgrounds are rendered clearly, although of course, with sources like 576p, the laws of physics cannot be fooled. Occasionally, there’s characteristic edge distortion of objects, but that’s the fault of the source itself, not the algorithm. A plus for not having issues with overscan – the image isn't artificially cropped or enlarged.

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 scaling the image, making even older recordings look quite decent on the 4K screen – they are consistent and free of digital noise. Interestingly, there’s a gradation reduction feature available in the settings. It’s particularly effective in combating what is known as banding in low-bitrate materials. Of course, you need to approach it with some caution. Due to the lower processing power of the chip (in comparison to the premium series), turning on this option can sometimes result in unwanted artifacts or blurring. Despite this risk, we encourage experimentation, as in many cases this feature can save a viewing of low quality.

Similar to the C8K, the C9K is also a really fast TV – both figuratively and literally. It features a 4K panel with a refresh rate of 144 Hz, and at lower resolutions, the panel can even ramp up to 288 Hz. Such speed translates into practice – while watching sports or playing games, the image looks very smooth and clear. Additionally, in movies, we get an extra motion smoother called Motion Clarity, which allows you to adjust the smoothness to your own preferences – from cinematic "judder" to almost theatrical smoothness.

When it comes to motion reproduction, the QNED80 unfortunately has a bit of a disadvantage. The TV is built on a 60Hz refresh rate panel, which is quite disappointing for the QNED series in 2025. If you're looking for perfect sharpness in dynamic football matches, you might feel a bit let down. The solution in this situation is the TruMotion system. It allows for artificially adding frames, which smooths out the picture in movies and TV shows. In the menu, you'll find a 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.

From a gaming perspective, the TCL C9K is a complete tool. It features two (out of four) full bandwidth 48 Gbps HDMI 2.1 ports, so all the key technologies work: VRR (Variable Refresh Rate) and ALLM (Auto Low Latency Mode). Additionally, the manufacturer has included a really intuitive Game Bar that allows you to quickly check the most important parameters and adjust settings without fumbling through menus. Also, TCL's policy is a plus – the TV isn’t afraid of any HDR formats, even in game mode. Whether it's HGiG or Dolby Vision for the Xbox Series S/X console – everything works as it should, giving the player plenty of freedom.

In the gaming section, we won't be pulling the wool over your eyes – the QNED80A is not e-sports equipment. The lack of 120Hz signal support is a fact to accept. However, LG's engineers have done everything to squeeze the maximum potential out of this 60Hz panel, providing gamers with a desirable set of features. Above all, the TV supports VRR (in the range of 48-60Hz) and ALLM. This means the image is smooth and doesn't stutter, and the TV automatically switches to low latency mode as soon as you grab the controller. Accessing these options is ridiculously easy thanks to the dedicated system overlay – Game Dashboard. It's also worth appreciating the support for the HGiG format. This is a nod to owners of modern consoles. Even though the screen doesn't support gaming Dolby Vision, HGiG ensures that the TV "understands" how to display games in HDR. This helps avoid the effect of blown-out clouds, which is unfortunately a plague on cheaper LCD TVs.