TCL C655 / C69B 98' vs TCL RM7L

The quality of HDR effect on the TCL C655 / C69B looks quite promising. The average value in the test charts is around 450 nits, which already allows for a hint of the brilliance of light effects and better image dynamics. However, as previously mentioned, this effect can be somewhat subdued by slight differences in bright and dark colours, resulting from the lack of local dimming technology. Nevertheless, the DCI-P3 colour gamut coverage of 94% deserves high praise, and this is made possible by the use of a quantum dot (QLED) panel. As a result, colours are vibrant and well-rendered when watching HDR content.

TCL RM7L is a bright TV. In our measurements its peak brightness hovered around 1600 nits. That is clearly less than the C7L, which can approach 2600 nits, but in real film scenes the difference between the models is not that large. In less demanding shots with many bright elements, the RM7L can sustain about 1000 nits, and sometimes even a little more, getting close to 1500 nits. It performs worse in dark scenes with small points of light, where their brightness can fall to around 500 nits. This is not random behaviour. The TV intentionally dims fine details to better control the backlight and preserve higher contrast. That comes at the expense of their intensity, but it is typical behaviour for TVs with local dimming in a similar price bracket.

Colour gamut coverage

In HDR not only brightness matters but also colour. And here the RM7L has plenty to show. Colours are highly saturated and a wide colour gamut is one of its major strengths. In our DCI-P3 measurements it reached about 96%, and BT.2020 around 83%. It is worth remembering that on a TV with this kind of backlight the result can vary depending on the scene. On test patterns colours look best, while in films their saturation is sometimes a little lower than on SQD Mini LED or QD-OLED TVs. The construction of the backlight itself is also interesting. The RM7L does not use the classic red, green and blue LED set. TCL used two green LEDs and one blue, with the red produced by a PFS phosphor. This shows up in spectrometer measurements, but it does not have a major impact on the picture. Colours are still rendered correctly.

The TCL C655 / C69B television offers a film mode that has been tested for colour reproduction quality. Although this mode is called film mode, unfortunately, it has many errors that the director would certainly not want to see when recording their work. Starting with image analysis, it's 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, making the colours too warm, and the overall image takes on a pink or yellow tint. The Colour Checker test confirms these errors – the colour samples stray into incorrect shades, affecting the overall colour fidelity. A minor issue is the brightness characteristics. However, this too is not without flaws. The gamma graph shows a strong spike at the beginning, which can cause the image to be excessively brightened, and the EOTF curve responsible for brightness in 4K HDR materials also has significant variations – it is evident how the television tries to maintain the appropriate brightness, but it does not always manage to do so effectively.

We checked the out-of-the-box colours in Filmmaker Mode, the best picture setting available to the user. TCL has been using it in its TVs for two years, and its aim is to reproduce the image as faithfully as possible in line with the creators' intent. On the RM7L it was indeed the most accurately set mode, although it was not without flaws. The biggest problem was the white balance. Too much red and blue made the image shift towards slightly pink tones. This was visible in both SDR and HDR. On top of that the brightness response was slightly boosted, making the picture appear a little brighter but at the same time less contrasty than it should be.

After calibrating the television's movie mode TCL C655 / C69B , the white balance has been adjusted, and the colours are displayed as they should be – which is confirmed only by slight deviations in the Colour Checker test. The gamma is really correct, which means the television shouldn't have problems 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" stronger in a given section of the screen. Despite this design limitation, which cannot be bypassed, we recommend adjustment in the settings, as the overall coloration looks really very good.

Thanks to the fairly extensive calibration menu we were able to correct the vast majority of the previously described issues. The biggest change concerned the white balance. After calibration it now looks very good, so the picture shed its pinkish tint and became much more neutral. The luminance response has also improved. Both the SDR gamma and the HDR EOTF curve are now much closer to the reference values. The picture is no longer unnecessarily brightened, and darker areas look more natural and have greater depth. Better luminance accuracy also affected the colours, which after calibration are noticeably more accurate. Not everything could, however, be set perfectly. With HDR material the RM7L still interprets part of the signal in its own way and does not always follow the reference curve precisely. This is most apparent in some darker scenes, where the TV can either slightly lift the shadows or darken them completely. That is where the earlier impression of a slightly brightened, less contrasty picture came from. Despite this, the calibration delivers a very good result. It removes the most visible errors and, above all, makes the picture much closer to how it should look.

The TCL C655 / C69B television handles tonal transitions in lower quality materials well. The "Gradual Smoothing" function, at its lowest setting, effectively eliminates visible banding, but at the same time causes a loss of detail, for example, in the texture of objects. The advantage is that it does not interfere with film grain, allowing the image to maintain a natural appearance.

In terms of digital processing, the television adds a considerable amount of artificial sharpness, which may appeal to those who prefer a crisp image. For those who favour a more subtle representation of details, this could be a downside. Another drawback is the rather aggressive overscan – the image gets cropped, leading to the loss of portions at the edges and limiting the field of view.

Upscaling and digital image processing are not the RM7L's strong suit. TCL has used the MediaTek Pentonic 700 chipset here, designated MT5896, which is not among the best processors when it comes to handling lower-quality source material. The biggest problems appear with heavily compressed content from YouTube or standard broadcast TV. The processor cannot effectively hide posterization and the characteristic banding between tones. The feature intended to smooth these issues does little to help, and can also interfere with the image too much, smoothing, for example, faces or fine textures. For that reason it is best simply not to use it.

Standard upscaling to 4K looks better. Lower-quality content is sufficiently sharp and retains an adequate amount of detail. It is not on a par with the best processors on the market, but for everyday viewing the result is entirely acceptable.

Unlike smaller versions, the 98” model stands out with significantly better motion fluidity. Instead of the standard 60 Hz, this colossal screen is equipped with a full-fledged 144 Hz matrix, which opens up entirely new possibilities – both for gamers and movie lovers. Thanks to the full motion smoother, the television provides incredible image fluidity, eliminating motion blur and enhancing the viewing comfort of dynamic scenes. It is worth noting that this technology works across the full refresh range, meaning that there is no need to compromise between fluidity and quality. Additionally, the "Flicker Reduction" function allows you to adjust the fluidity to your own preferences – you can opt for a more cinematic effect with visible frames or an extremely smooth image.

The RM7L features a 144 Hz VA panel, so from the outset it is well suited to sports, gaming and other fast-paced content. The high refresh rate also gives the motion interpolation more scope, allowing it to generate additional frames. On the RM7L it works well and, with the right settings, can noticeably improve motion smoothness without an excessive soap opera effect.

The 98-inch TCL C655 / C69B is excellently equipped for gamers. Full HDMI 2.1 ports and a 144 Hz panel allow for gaming in 4K at 120 Hz, providing fluidity and responsiveness that will impress even the most demanding.

The television supports Variable Refresh Rate (VRR), eliminating screen tearing, while the Automatic Low Latency Mode (ALLM) ensures that the game starts immediately without the need for manually switching settings. There is also support for Dolby Vision and HGiG, making the image quality in games even better – details are sharp, colours are natural, and contrast is perfectly balanced.

Additionally, the television offers a dedicated gaming panel that allows for quick adjustment of picture settings without the need to exit the game. It is a device that meets virtually all the requirements of a modern gamer.

The RM7L earns almost nothing but praise when it comes to features for gamers. The TV supports ALLM, VRR and Dolby Vision Gaming and works properly with HGiG, so it’s hard to point to any major omissions in that regard. In practice this means automatic switching to a low-latency mode, smoother motion at variable frame rates and accurate brightness reproduction in HDR games. There’s also a very useful Game Bar. From it you can quickly check frame rate, VRR status, signal format or aspect ratio, and change the key settings without leaving the game. TCL has also added a few extra options, such as a crosshair overlay and brightening of dark image areas, which can be handy in some titles. The biggest drawback stems from the use of the Pentonic 700 processor. Only two of the four HDMI ports support the full HDMI 2.1 standard. That won’t matter much with a single console, but if you connect two consoles and a PC you may run out of ports, especially since one of those ports may be needed for eARC and a soundbar.