Philips OLED809/819 vs TCL C9K

Philips OLED 809 delivers a more than satisfying HDR effect. The television is capable of generating brightness exceeding 900 nits in almost every scene, and sometimes even over 1000. This result allows for a full experience of content with a wide tonal range. The only moment when Philips OLED 809 is unable to generate higher brightness is in a scene from the movie “The Meg,” which features a large amount of bright white across a significant portion of the screen. However, this cannot be regarded as a poor result, as it represents a considerable improvement over its predecessor. Generally speaking, such values for OLED panels produced by LG Display, which do not feature MLA technology, are very, very good. When combined with high coverage of the DCI-P3 colour gamut, they allow for an exceptional HDR experience. The Philips OLED 809 test showed that this television supports popular HDR formats such as Dolby Vision and HDR10+.

As we mentioned with black and contrast – the C9K makes a huge impression in synthetic tests. Our measurements showed that on a screen 10% filled with white, the television is capable of squeezing out... 4000 nits of brightness! It sounds cosmic, but – and here unfortunately the pattern repeats – the numbers say one thing, and practice another. In real film scenes, the situation looks different. In the best case, when the light effects occupy a large part of the image and the local dimming algorithm doesn't have to think too hard about what to do with thousands of zones – the result is really quite good. At that point, the C9K can reach about 1500 nits, which provides a pleasant, intense flash and can indeed make a positive impression.

The problem begins 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 even to 400–500 nits. This is a huge difference compared to the potential of 4000 nits that we saw in laboratory tests. Why does this happen? Most likely, the television tries to protect the black and minimise the halo effect around bright objects. Unfortunately, this comes at the cost of details – some of the intricate details simply disappear, and the scene loses its nature.

The best factory mode in which we conducted all our tests was "Filmmaker", which has become rather standard in televisions from this manufacturer. However, let's check what its characteristics were before we began the calibration process. The first aspect we will examine is white balance, as despite appearing unassuming, it determines whether the image will be free from any kind of tint. The graph clearly shows that both in SDR and HDR materials, there was a dominant presence of two colours: red and green, which resulted in a strong yellow tint that was ubiquitous across the entire image. This is perfectly visible on the "ColourChecker" palette, where all hues shifted towards their warmer counterparts. The second thing we will scrutinise is, in our opinion, the two most important graphs regarding image quality assessment: gamma and the EOTF curve. Both aim to maintain adequate brightness and contrast. The first one serves to describe the brightness level in SDR materials, while the second shows the rate of luminance increase. Analyzing the first one, we can observe that it was extremely lowered compared to the reference value marked by the orange line. This situation resulted primarily in a sharp increase in brightness and a significant reduction in contrast, almost reminiscent of that in OLED televisions. The EOTF curve exhibited greater "moderation" and only slightly brightened the entire image to 50% of the maximum brightness.

For colour tests, we once again reached for the Filmmaker mode – a new feature in TCL televisions for 2025. And although the direction itself is a step in the right direction, the execution leaves much to be desired. The white balance in SDR content turned out to be too warm – there was an excess of red. Conversely, 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 – managing brightness. Regardless of whether we were watching SDR or HDR content, the image had a tendency to blow out the entire scene, giving it an unnatural, almost grotesque character. Therefore, it is hard to call this a 'director’s mode' – because the director surely has never seen such an image.

Philips, like most leading manufacturers, has been providing advanced tools for calibration processes for years. Here we will find both 2- and 20-point grey scale adjustments, as well as an advanced CMS (Colour Management System). As you can observe, this has brought about extremely beneficial results and profoundly changed the perceived image. Practically every one of the elements mentioned above has undergone a transformation and has been brought back to its natural state. This is particularly evident on the "ColourChecker" palette, where the measured samples are harmoniously in place. It must be said that the white balance has turned out exceptionally well, allowing us to enjoy a clean image free from any tint in both SDR and HDR materials. The biggest issue of OLED809, namely gamma, has been properly modelled and only shows minor errors here and there, which will not affect the overall picture. The EOTF curve, on the other hand, has been rid of that subtle brightening and now presents itself as reference-level.

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 with 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 managing brightness was also brought under control in SDR content, and the effect was more than satisfactory. Unfortunately, when we switched on the HDR material, the situation quickly became complicated. No matter how we set the local dimming, the television had a tendency to do what it pleased with the image – either overexposing the whole picture or dimming the darkest parts too much. Just like we saw in the scene from the film Billy Lynn. Colour-wise, the improvement after calibration makes a great impression, but managing brightness in HDR remains the Achilles' heel of the C9K and constitutes a technological limitation.

Philips OLED 809 did not perform particularly well in the test of tonal transition fluidity. Moving on to the part of the test where we assess the behaviour of the television's algorithms, we will once again check the function responsible for removing posterization. Indeed, such a function exists in the menu and has several available options. As you can see in the picture on the left, although its presence has been confirmed by us, it is not useful. Only at the highest setting does it effectively remove stuttering; however, it blurs the entire image in the process. Therefore, it is completely useless.

It happens more than once or twice that you and we watch lower quality materials. In this case, the quality of the image upscaling algorithms can have a beneficial effect. We must admit that those implemented in OLED 809 work quite efficiently and improve image quality without visible artifacts. You can only notice slight edge fringing; however, it is unlikely to be visible during normal viewing.

The digital image processing in TCL C9K is rather mediocre. The tone transition smoothing feature is supposedly present, but activating it hardly makes any difference – colour banding is still visible, and it can inadvertently highlight elements we would prefer to hide, such as textures of objects. Fortunately, it does not remove film grain, but that's scant consolation considering the effects are still poor. Thus, it's hard to recommend using this option.

On the other hand, image scaling performs significantly better. Lower quality materials look quite decent – characters and backgrounds are represented clearly, although of course, with sources like 576p, the limitations of the physics cannot be disguised. Sometimes, there's characteristic aliasing of objects, but that's due to the source itself, not the algorithm. A plus for the fact that there are no overscan issues – the image is neither artificially cropped nor enlarged.

The maximum refresh rate we can set on the tested television is 144 Hz. This value can be achieved by connecting it to a really powerful PC. In the case of consoles or television, everything remains the same. For those who require high smoothness of motion or dislike the characteristic stuttering of films recorded at 24 fps, the manufacturer has prepared a fairly extensive motion smoothing system. In the dedicated tab, we will find a slider for “Smoothness” that is responsible for eliminating stutter, and “Motion Blur Reduction,” which helps increase the sharpness of dynamic elements. The function works very well and granularly, meaning that each setting has a real impact on the perception of motion. We also mention that it works at a refresh rate of 120 Hz, as it operates on multiples of film or television materials. With such an extensive set of options, every user will find their golden mean. In the picture, we present our choice, which is slight smoothing without the soap opera effect.

Motion is influenced not only by settings on the television but also by the response time of the panel itself. OLED televisions feature the best response time on the market, which in the case of 809 is about 0.1 ms. There are no IPS/ADS or especially VA panels that come close to the results of organic panels.

Similar to the C8K, the C9K is also a really fast television – both figuratively and literally. On board, we have 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 picture looks very smooth and clear. Additionally, in films, we get an extra motion smoothing feature called Motion Clarity, which allows you to adjust the smoothness to your own preferences – from the cinematic "stuttering" of frames to nearly theatrical smoothness.

The Philips OLED 809 television supports all technologies included in the HDMI 2.1 standard, and during our testing, each one activated without any problems. Therefore, we must state that this television is perfectly suited for all gamers, whether they are using a console or a computer. It is worth mentioning that the manufacturer has opted to implement the HGIG mode, which provides a great alternative to Dolby Vision, which unfortunately in the OLED809 is unplayable due to very high input lag.

A nod to gamers is also the inclusion of a dedicated GameBar, which allows for monitoring current gameplay parameters and quick changes to settings. We will also find a function to enable a crosshair, which will be very useful when shooting with a sniper rifle, but from the so-called hip. Additionally, we can also find a shadow enhancement function for better visibility in shadows and a colour filter for gamers with visual impairments.

In summary, the OLED 809 is a very good and versatile device for gamers. Anyone who purchases this television for gaming does not need to worry about anything, as it is simply made for gaming. Especially since features such as VRR, ALLM, G-Sync, FreeSync, or HDR Dolby Vision gameplay will allow for an even greater immersion in their favourite title. Lastly, we will add that the only downside of the television in game mode is the artificial image sharpening, regardless of the settings, and it cannot be 'softened'.

For gaming, the TCL C9K is a complete tool. Here we have two (out of four) HDMI 2.1 ports with full bandwidth of 48 Gbps, 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, which allows you to quickly check the most important parameters and adjust settings without rummaging through the menu. Also worth noting is TCL's policy – the television does not shy away from 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 a wide range of freedom.