LG OLED C4 vs Sony Bravia 9 (XR90)

The HDR performance of the LG OLED C4 is impressive, firmly placing it in the higher tier. Most films exceed 700 nits, delivering a highly realistic image. While none surpass the 1,000-nit mark, the combination of these results with the TV’s infinite contrast and perfect blacks significantly enhances the visual experience. The final scene, with a full-screen flash of sunlight, is slightly less bright than the others but still maintains a solid level of brightness. Another highlight is the excellent DCI-P3 colour gamut coverage, which ensures incredibly vibrant colours. The HDR technology in the LG OLED C4 delivers exceptional colour and detail reproduction. The dynamic tone mapping feature optimises brightness levels, ensuring ideal light reproduction in every scene, even in the most demanding high-dynamic films.

The brightness performance of the Sony Bravia 9 is exceptional. Each scene reaches over 1500 nits, and the television can shine even brighter during movie playback. This level of brightness provides an extraordinary viewing experience, allowing for immersive interaction with high-quality video content. Thanks to its extensive coverage of the DCI-P3 colour gamut, the image is vibrant, and when combined with such high luminance, it almost feels alive. With its impressive peak brightness, viewers can fully appreciate the colour range, even in the most challenging scenes involving dynamic lighting changes. The Bravia 9 also supports Dolby Vision and HDR10 formats, further elevating the viewing experience.

The best factory mode on the tested television was "Filmmaker," which served as the basis for all evaluations. In terms of colour reproduction, this mode performed reasonably well; however, certain flaws significantly detracted from the overall viewing experience. The most fundamental issue was the white balance, which exhibited a noticeable dominance of red, skewing the image characteristics. This resulted in a pronounced yellow tint to whites and a general shift of all colours towards warmer tones.

The gamma, an equally crucial—if not more important—aspect, was notably lowered, leading to a marked reduction in contrast. Additionally, the television frequently lost detail at the start of the gamma curve. These issues were most apparent in SDR content.

When examining HDR materials, the same yellowing effect in the white balance was observed, as seen with SDR content. However, the EOTF curve, which replaces the gamma curve for HDR, was near perfect and left little room for criticism.

The "IMAX Enhanced" factory mode has remained the best option in Sony televisions for years, and it was used throughout the entire testing process. While it aligns closely with the reference compared to other predefined settings, improvements could be made for a better viewing experience.

In SDR materials, the gamma shows a noticeable boost, which leads to over-contrasting the image. Additionally, the beginning of the graph deviates significantly from the reference, resulting in merged details in the darker areas, creating an unpleasant uniform blotch. The EOTF curve in HDR content, on the other hand, appears mostly correct, with only minor deviations from the reference.

However, the most prominent issues affect the white balance. There is a persistent green colour dominance, leading to problems with grey tones and overall colour misalignment. This imbalance in the white balance gives the image an unwanted greenish tinge, negatively impacting the overall visual quality.

As mentioned, LG televisions come with advanced tools to facilitate an accurate calibration process. By utilising these tools, we meticulously adjusted the image to align with the director’s original vision. Without overstating, the results were outstanding. Both SDR and HDR content now achieve a level of visual fidelity that reflects how films are intended to be seen.

Examining the colour accuracy on the "ColourChecker" palette reveals impressive results, with almost all colour errors falling below a delta of "1," aside from two minor exceptions. Post-calibration, the LG OLED C4 demonstrated a marked improvement in colour reproduction, particularly in SDR and HDR modes. Testing the TV after calibration highlighted its capacity for delivering exceptionally accurate colours, underlining the high calibre of this model. The LG C41LA offers a stunningly precise colour palette, sure to satisfy even the most discerning viewers.

The colour reproduction after the calibration process on the Sony Bravia 9 is nothing short of excellent. Regardless of the signal, whether SDR or HDR, the image comes remarkably close to the director's intended vision. Nearly every flaw in the image has been meticulously modelled and corrected to a high degree.

This impressive result can be attributed to the advanced tools available for calibration, which Sony has been offering in its televisions for years. Notable tools include the 2- and 20-point grayscale calibration and a very comprehensive CMS (Colour Management System). These features allow for precise adjustments, ensuring that the colours and overall image quality are as accurate and faithful to the source material as possible.

Let us revisit the function responsible for smooth gradation and consider its role in improving lower-quality materials. The default smoothing of tonal transitions, while decent, can be further enhanced. The feature includes a slider for adjusting its strength, and we recommend selecting the first option. This setting strikes a balance, offering excellent results without compromising important details through unnecessary blurring.

The image scaling on the LG C4 is commendable, though not entirely without flaws. By default, the image appears slightly sharper, though not to an intrusive degree. While jagged edges on elements like trees are occasionally visible, this issue is relatively minor compared to similar offerings from other manufacturers.

When analysing the quality of tonal transitions and image scaling, especially for lower-quality materials, the improvement after activating the function for tonal transitions is clear. By default, the quality is quite average, but once the function is turned on, even at the lowest setting, the results are among the best we've seen. This feature can be enabled without worrying about negative side effects, such as film grain blur.

Sony's "XR" processor, which the brand has been touting for several years, lives up to its reputation for image scaling. The image quality is incredibly sharp while maintaining a very natural look. This reinforces that Sony's processing technology is one of the best available, particularly when handling lower-resolution content.

The LG G4 supports a maximum refresh rate of 144 Hz, achievable only when connected to a high-performance PC. Otherwise, the television operates at a maximum of 120 Hz, the recommended setting for viewing sports or content with fast-paced motion. For those prioritising smooth image quality, LG has included a versatile motion smoothing feature called "TrueMotion." This function is split into two adjustable sliders: De-Blur, which sharpens moving images, and De-Judder, which reduces jitter. Both sliders offer a range of settings from 0 to 10, enabling users to fine-tune the motion smoothness to their preference.

The LG OLED C4 boasts an impressive average response time of less than 1 millisecond, as confirmed by our measurements. This results in exceptional image clarity, far surpassing LCD televisions, which often have response times of several milliseconds. This clarity is evident in tests like the "UFO Test," where no trailing blur is visible behind moving objects.

The maximum refresh rate of the Sony Bravia 9 is 120 Hz, the minimum for those primarily watching sports or other high-motion content. This refresh rate ensures the image remains sharp and smooth, even during fast-paced scenes. For more demanding users, Sony has implemented an advanced motion smoothing system, divided into three distinct segments: Smoothness (Film), Smoothness (Camera), and Clarity. These settings can be adjusted to various degrees, allowing users to fine-tune the picture to their preferences. For example, a setting with slight smoothing can be used to avoid the "soap opera effect," delivering a more natural and cinematic viewing experience. This level of customisation ensures that viewers can find their ideal balance between smoothness and clarity.

The LG C4, like nearly all OLED televisions from the manufacturer, excels in its compatibility with consoles and PCs. With the inclusion of four full-bandwidth HDMI 2.1 ports supporting 48 Gbps, the TV incorporates a range of features to enhance the gaming experience. Notably, it offers simultaneous support for FreeSync and G-Sync, making it an ideal choice for gamers using AMD or Nvidia graphics cards. For those seeking the best possible gaming quality, the integration of HDR Dolby Vision and HGIG mode is particularly impressive. HDR Dolby Vision operates with remarkably low input lag across all settings, ensuring smooth and responsive gameplay.

A standout feature in LG's televisions is the GameBar, which allows users to adjust settings in real-time without leaving the game. This includes options for customising the image for viewers with visual impairments, a thoughtful addition. Additionally, enabling VRR (Variable Refresh Rate) does not result in a loss of contrast—a benefit of the OLED panel's self-emissive technology, eliminating the need for conventional backlighting. While some slight flickering of grey tones may occur, this is a characteristic of VRR technology across all manufacturers.

In summary: The LG C4, like the brand's other OLED models equipped with high-refresh-rate panels and HDMI 2.1, provides a seamless and immersive gaming experience. For gamers demanding top-tier performance, this TV is an outstanding choice.

The Sony Bravia 9 television is equipped with four HDMI ports, but what is puzzling for a device of this class is that only two of them operate in the 2.1 standard. Despite this, it should not detract from the fact that nearly all features work excellently, providing a positive experience when using them. Games running in HDR10 or Dolby Vision benefit from low input lag, ensuring a comfortable gaming session. The solid implementation of the HGIG mode is a noteworthy feature, as, after proper calibration, it closely aligns with Dolby Vision.

Sony introduced the GameBar feature to its televisions last year, a standard for many manufacturers. This feature allows for quick adjustment of settings without exiting the game. Its implementation has been seamless, offering conveniences such as a crosshair grid, black level adjustment, and reducing the screen to gaming monitor proportions.

The Sony Bravia 9 will find its fans, particularly among PlayStation enthusiasts. It is a natural pairing since the console and the television share identical capabilities. However, more broadly speaking, despite the minor issues with Dolby Vision in games, the Bravia 9 remains a very good television for gaming overall.