LG OLED C4 vs Hisense U8Q

The results of HDR materials are definitely among the better ones. Practically every film significantly exceeds the 700 nits barrier, allowing for a very realistic image. Of course, none of them surpasses the magical thousand, yet the combination of such results and unlimited contrast and black effectively boosts the outcome optically. The last of the scenes, featuring a full-screen burst of sunlight, is actually less bright than the others, although it still represents a commendable level. It is also worth mentioning the excellent coverage of the DCI-P3 colour palette, which will allow for achieving extremely vivid colours.

When it comes to HDR, the Hisense U8Q shows its claws. On paper, that is, in synthetic measurement tests, the television can achieve nearly 4000 nits of peak brightness. This is a value that most models can only envy. In practice, this translates to very strong light effects in films – in some scenes, we managed to measure a real brightness of between 1500 and 2000 nits, which is a level typically reserved for the absolute top tier of televisions on the market.

Of course, it's not always perfect. In small, pinpoint elements, brightness can drop – a good example is scene number 4 from the film Sicario 2, where instead of thousands of nits, we get around 500. But it’s worth noting that the effect does not disappear completely – the light is still visible, and the image does not seem artificially dimmed. This is a typical issue with Mini LEDs, so it's difficult to consider this a major downside.

On the other hand, the colour reproduction is a huge plus. Thanks to additional coatings that enhance colour saturation, the U8Q nearly covers the entire DCI-P3 colour space (98%), and for the wider BT.2020 range, it achieved over 80%. This is an excellent result that makes HDR films look rich, vivid, and simply very cinematic.

The best factory mode implemented in the tested television was "Filmmaker". It was this mode that we used during all tests. This mode proved to be quite good in terms of colour reproduction; however, other shortcomings effectively detracted from the enjoyment of viewing. Starting with the most basic aspect, the white balance, it was easy to notice that it was marked by a dominance of red, which overall changed the characteristics of the image. We could thus see a strong yellowing of the whites and a shift of all colours towards warmer shades. The gamma, which is a curve just as important, if not more so, was quite significantly lowered, resulting in a considerable drop in contrast, except at the beginning of the graph, where the television insidiously lost details. That’s all regarding SDR materials. Taking a closer look at films with a wide dynamic range, we can observe exactly the same phenomenon of yellowing of the white balance as in films with a standard colour palette. The EOTF curve, which replaces our gamma curve, is practically perfect and cannot be faulted.

We must admit that when the U8Q arrived at our editorial office, we were slightly surprised… and positively so. Usually, in televisions, the white balance immediately requires adjustment – it can be too warm or too cold, which immediately leads to strange colour mistakes. Meanwhile, here the situation looks really good straight out of the box. Of course, we are talking about our unit, so there is no guarantee that every model will be equally well calibrated, but in our case, the first impressions were very positive. The only more apparent issue concerned the way the television manages brightness. Looking at the EOTF graph, it is clear that the U8Q tends to brighten small elements on the screen. This, in turn, caused what we mentioned earlier – slight overexposure and the impression that the entire scene can be a bit too bright. However, this is not a flaw that undermines the picture, rather an effect characteristic of this model.

As we mentioned earlier, LG televisions are equipped with advanced tools for carrying out the calibration process. We therefore used them to model the image in the way that the director intended. And without modesty, we must admit that we achieved this phenomenally. Both SDR and HDR materials present a level that clearly indicates that this is how a film should look. It is worth looking at the colour errors on the "ColorChecker" palette here, where practically none of them exceeds "1", apart from two samples.

Of course, we wouldn’t be ourselves if we didn’t make adjustments to the white balance. After calibration, we managed to equalise the SDR signal to practically perfection – older films, YouTube content, and classic television looked almost ideal on the U8Q. This is truly an exceptional level that shows this model can do a lot if given a bit of help. Unfortunately, the situation is different with HDR content. The colours themselves don’t pose many problems, but the U8Q’s biggest issue remains the EOTF brightness characteristics. In practice, the television tends to “over-expose” beyond how the image should look in its original form. It’s that slight "bleeding" that we noticed earlier in comparisons with the best screens on the market. It’s a bit of a shame that this characteristic can’t be fully tamed – if we could maintain equally good control over brightness in HDR as in SDR, we would be dealing with an absolutely reference-quality image.

Once again, we will take a look at the function responsible for smooth gradation, but we will also address the one that aims to improve the quality of lower-quality materials. The default smoothing of tonal transitions, as we have seen, was not the worst, but it can still be improved. The function has a slider, which allows us to adjust its strength. We recommend using the first one, as it yields very good results and does not blur important details.

Image scaling in 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. Admittedly, there are jagged edges on the trees, but this is not a major issue compared to other manufacturers.

Hisense U8Q handles lower quality materials quite well. The television can smooth out tonal transitions thanks to the "Smooth and Gradient Picture" feature – it works best when set to Medium. At this setting, it nicely dims unwanted bands and unevenness in the picture, but importantly, it does not remove the film grain or fine details.

The upscaling itself is also at a good level. Images from lower resolutions appear smooth and soft, sometimes even overly so – we get a plastic effect that may not appeal to everyone. Fortunately, this can be easily corrected with the sharpness slider, allowing the picture to be adjusted to personal preferences.

The maximum refresh rate that we can set on the LG G4 is 144 Hz. Naturally, this is only possible when connecting the television to a very powerful PC. In other cases, we will be operating at a maximum refresh rate of 120 Hz, which is recommended if we primarily want to watch sport or content with a lot of motion dynamics. For those requiring high fluidity of the image, the manufacturer has implemented a multi-step 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 within a range from 0 to 10, with each degree affecting the degree of smoothing, allowing everyone to find their golden mean.

The LG OLED C4 panel features an average response time of less than 1 ms (which directly results from our measurements), allowing for an incredibly clear image that is unattainable for LCD televisions, whose response times can be as high as several milliseconds. This is clearly visible in the pictures from the "UFO Test," showing no trailing blur behind the object.

Hisense U8Q features a panel that can refresh the image up to 165 Hz in 4K resolution. In practice, this will primarily be utilised by PC gamers, but as the saying goes – it’s better to have it than not 😊. For films and series, we have a built-in smoothness enhancer called Ultra Motion Smoothness. In the settings, it can be easily adjusted to suit personal preferences – whether we want a more “cinematic” frame rate or a smooth, theatrical spectacle.

We can already say that LG C4, like practically every OLED television from the manufacturer, is exceptionally good in terms of compatibility with consoles and PCs. Thanks to the implementation of four full bandwidth HDMI 2.1 ports at 48 Gbps, the manufacturer has included all features that enhance the gaming experience, among which we find simultaneous support for FreeSync and G-Sync technology. With such a tandem, gamers with a graphics card from AMD or Nvidia can confidently opt for C4. However, what should delight the players requiring the highest possible quality the most is the simultaneous implementation of HDR Dolby Vision and HGIG mode. The first is particularly important as it works with extremely low input lag in all settings.

A standard in the Korean manufacturer's televisions is also the implementation of GameBar, allowing for quick adjustments of settings "on the fly" without the need to exit the game. It also enables image adjustments for visually impaired individuals, which is a very nice touch. Another important piece of information is that when VRR technology is enabled, we will not experience a drop in contrast. This is, of course, due to the panel's design and the absence of conventional backlighting. However, it is 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 of the manufacturer's OLEDs equipped with high refresh rate panels and HDMI 2.1 ports, creates a harmonious whole with consoles. In practice, it is a complete television, and if we expect the highest possible performance in gaming, C4 will be an ideal choice.

In terms of features, the Hisense U8Q has practically everything one could expect from a modern gaming television. Thanks to the new processor, the manufacturer managed to implement as many as three HDMI 2.1 ports, so there is no problem connecting several consoles or a computer. On top of that, it includes all the key technologies – Game Bar with parameter preview, variable refresh rate (VRR), automatic low latency mode (ALLM)… in a word, a complete set.

But as is often the case with Hisense, it fell a bit short of perfection. The biggest drawback remains the lack of support for the HGiG format, which allows the brightness of the television to be adjusted to the console and maximises HDR in games. It’s a shame, because if this element were included, we would have a device practically made for gamers. As it stands, the U8Q remains “only” a very good choice 😉