Sony Bravia 7 (XR70) vs LG OLED C4

Now that we know the TV handles contrast well, let’s check how it performs in terms of HDR effects. The luminance graph shows very high capabilities for this model – 1500 nits is truly an impressive result. HDR effects are particularly striking in scenes where most of the screen is covered in light, such as in the 1st, 3rd, and 5th test scenes. Minor imperfections, typical of this technology, are still visible with very small light effects, as seen in the scene from the film "Sicario 2," where brightness drops to 500 nits. Although these aren't staggering results, they can be considered decent. Additionally, it's worth praising the TV for its high coverage of a wide colour gamut – DCI-P3 at 96%, which allows for vibrant, saturated colours.

The results of HDR materials are definitely among the better ones. Practically every film significantly exceeds the 700 nits barrier, which allows for a very realistic image. Of course, none of them surpasses the magical thousand, however, the combination of such results along with unlimited contrast and black effectively boosts the visual outcome. The last of the scenes, featuring a fullscreen sun burst, is indeed less bright than the others, although it still represents a respectable level. It's also worth mentioning the excellent coverage of the DCI-P3 colour palette, which will enable the achievement of exceptionally vivid colours.

The IMAX Enhanced mode on the Sony BRAVIA 7 TV is definitely the best mode available on this model, although it is not without its flaws, as its name might suggest. The biggest issue is white balance – both in HD and 4K HDR content, there is a noticeable dominance of the red colour, which causes the image to take on pinkish hues. This is particularly evident on the test image with snow, where the pinkish tint becomes very noticeable. Errors in the Colour Checker test also confirm these deviations – although they are not catastrophic, there is a tendency to lean towards warmer tones. In terms of brightness characteristics, the gamma remains at a decent level with a slight spike but without major issues. However, the biggest challenge is with 4K material. It is clear that the EOTF curve is significantly above the reference graph, making the image appear overly bright.

The best factory mode implemented in the tested television was "Filmmaker". That was the one we used during all tests. This mode, in terms of colour reproduction, turned out to be quite decent, although other flaws effectively detracted from the enjoyment of the viewing experience. Starting with the most basic one, which is white balance, it was easy to notice that this was marked by a dominance of red, which completely altered the characteristics of the picture. We could see a strong yellowing of the whites and a shift of all colours to warmer tones. The gamma, which is a graph as equally important, if not more so, was quite severely reduced, resulting in a significant drop in contrast, except for the start of the graph, where the television insidiously lost details. That’s all regarding SDR materials. Looking closely at films with a wide dynamic range, we can observe exactly the same phenomenon of white balance yellowing as in films with a standard colour palette. The EOTF curve, which replaces the gamma chart for us, is practically perfect and cannot be faulted.

Sony BRAVIA XR70 offers a wide range of tools that allow you to customise the image to your own preferences, enabling significant adjustments to the settings. White balance has been freed from the red colour dominance issue – snow no longer takes on pink hues, which was previously noticeable. Although there are slight deviations in the final part of the white balance chart regarding a drop in blue colour, they are acceptable and difficult to notice in everyday use. The Colour Checker test confirms that colour reproduction errors are no longer as pronounced and rarely exceed a value of 2, which is a very good result. As for brightness, gamma, although it didn't require major improvement, has been slightly adjusted. However, the most significant change has been noted in the EOTF curve – the television no longer has issues with excessively brightening the entire image in 4K materials. However, upon closer examination and incorporating the EOTF characteristics in film materials, some limitations of the television become apparent due to the previously discussed dimming algorithm. Some small elements may be slightly more illuminated, but these errors are minor enough that most users won't notice them. Overall, the calibration results are very, very positive.

As we mentioned earlier, LG televisions are equipped with advanced tools for carrying out the calibration process. We used them to model the picture in line with what the director envisioned. And without modesty, we must admit that we achieved this phenomenally. Both SDR and HDR materials present a level that clearly indicates this is how a film should look. It's worth taking a look at the colour errors on the "ColorChecker" palette, where practically none of them exceed "1", except for two samples.

Since we know that the television handles high-quality content very well, it's worth checking how it performs with lower-quality material. Here, the television shows its potential, and the graphics processor used works remarkably well. On the test screen with the light bulb, there are no issues with colour blending, and the gentle gradation function works very well – we recommend setting it to "Medium".

When it comes to digital processing, or the so-called upscaling, the television sharpens the image quite significantly, which leads to a slight jaggedness, for example on branches in the background, but it doesn't remove desired details. Despite this, the overall appearance is really attractive and may appeal to most users. However, if you prefer a softer, more plastic image, you can reduce this effect in the settings by adjusting the sharpness level to your liking.

Once again, we will take a look at the feature responsible for gentle gradation, but we will also address the one that aims to enhance the quality of lower-quality materials. The default smoothing of tonal transitions, as we could see, was not the worst, but it can be improved further. The function has a slider that allows us to adjust its intensity. We recommend using the former, as it produces very good results and does not blur important details.

Image scaling on LG C4 is quite good, however, it cannot be said to be without flaws. The image is slightly sharper by default, although not in a very noticeable way. While jagged edges of trees can be seen, it is not a major issue when compared to other manufacturers.

The Sony BRAVIA 7 TV with a 120 Hz panel will satisfy most users in terms of motion fluidity. Additionally, Sony offers a Motion Flow feature that allows for the selection of three different picture settings, adjusting them to personal preferences: Smoothness – Film: This setting improves motion fluidity, giving the image a more cinematic or theatrical quality. Smoothness – Camera: This setting provides even greater fluidity, useful for watching dynamic scenes like sports broadcasts. Clarity: This setting focuses on minimising noise and motion artifacts, resulting in a more stable and clear image.

The maximum refresh rate we can set on the LG G4 is 144 Hz. Naturally, this is only possible when connecting the TV to a very powerful PC. Otherwise, we will operate at a maximum refresh rate of 120 Hz, which is recommended if we primarily want to watch sports or content with a lot of motion dynamics. For those who require high fluidity of the image, the manufacturer has implemented a multi-level motion smoother called "TrueMotion". It has been divided into two separate sliders that adjust the sharpness of moving images (De-Blur) and judder (De-Judder). Both sliders can be set in the range of 0 to 10, with each degree affecting the level of smoothing, allowing everyone to find their sweet spot.

The panel of the LG OLED C4 features an average response time of less than 1 ms (which directly results from our measurements), enabling the achievement of an extremely clear image, unattainable for LCD TVs, which can have response times of up to several milliseconds. This is clearly evident in the images from the "UFO Test," which show no trailing blur behind the object.

Sony Bravia 7 has significantly improved its capabilities in terms of compatibility with consoles compared to earlier models. The TV supports variable refresh rate (VRR), which eliminates screen tearing, and it syncs with graphics cards to ensure smooth display. The automatic low latency mode (ALLM) effectively reduces input lag, which is crucial in dynamic games. Dolby Vision with low latency further delivers impressive HDR effects that look great during gameplay.

Sony Bravia 7 also offers a Game Bar feature, providing quick access to settings and monitoring parameters while gaming. An interesting option is the ability to enable a virtual on-screen reticle, which can give a slight advantage in shooter games. However, compared to the Bravia 9 model, the HGIG feature in the Bravia 7 doesn't perform as well, which may be noticeable for more demanding gamers – particularly as the HGIG mode is becoming increasingly popular among gamers as the preferred method for reproducing HDR effects.

A downside is the lack of support for 1440p@120 Hz resolution, which could make gaming easier for users with less powerful graphics cards. Additionally, the Sony Bravia 7 is equipped with two HDMI 2.1 ports, one of which is often used to connect an audio system via eARC, limiting the number of available ports for connecting next-gen consoles.

We can now say that LG C4, like practically every OLED television from the manufacturer, is exceptionally good in terms of cooperation with consoles and PCs. Thanks to the implementation of four full-bandwidth HDMI 2.1 ports at 48 Gbps, the manufacturer has embedded all the features that enhance gaming comfort, including simultaneous support for FreeSync and G-Sync technologies. With such a tandem, players with graphics cards from AMD or nVidia can safely choose C4. However, what should please gamers demanding the highest possible quality the most is the simultaneous implementation of HDR Dolby Vision and HGIG mode. The former is particularly important as it operates with extremely low input lag in all settings.

A standard feature in televisions from the Korean manufacturer is also the implementation of GameBar, allowing for quick adjustments of settings "on the fly," without the need to exit the game. It also allows for image adjustments for people with visual impairments, which is an incredibly nice touch. Another important piece of information is that when VRR technology is enabled, we won’t experience a drop in contrast. This is, of course, due to the design of the panel and the absence of conventional backlighting. It is, however, normal for shades of grey to flicker slightly, although this is a characteristic feature of this function regardless of the manufacturer and television.

In summary: LG C4, just like all the manufacturer's OLEDs equipped with high-refresh-rate panels and HDMI 2.1 connections, creates a harmonious whole with consoles. In practice, it is a complete television, and if we expect the highest possible efficiency in gaming, C4 will be an ideal choice.