IFFALCON U85X vs LG OLED B6

iFFALCON U85 handles HDR in a rather dual manner – on one hand, it can surprise with a solid peak brightness of around 650 nits, which places it significantly above average in this price segment. This is particularly evident in bright, full-screen scenes. Examples from movies like Life of Pi or the final test sequences from The Meg prove that the television can maintain the power and essence of the HDR effect when the entire panel needs to “ignite,” providing truly satisfying experiences. However, problems arise in high-contrast scenes, where smaller, bright details appear on the screen; the dimming algorithms prioritise black depth so much that they can crush the brightness of small bright points down to just 100 nits, drastically lowering the image dynamics and depriving us of the real “bite” we expect from HDR standards. However, the question of colours remains a sweetener, as thanks to the use of the PFS phosphor filter (marketed as QLED by the manufacturer), they look very good, achieving nearly 94% coverage of the DCI-P3 colour gamut, which allows for a rich and vivid image in most content.

LG B6 is a moderately bright OLED. After calibration it reaches around 800 nits, roughly 200 nits more than last year's B5. That's down to LG Display's new budget OLED SE panel. In practice this simply provides a bit more headroom and makes HDR look fuller in many scenes than on last year's lower-end OLEDs. That doesn't mean the B6 has no limitations. In very bright shots, when a large part of the screen is brightly lit, brightness can fall below 400 nits. This behaviour is typical of OLED TVs (especially in this segment), and it's then you see the biggest difference compared with pricier models. All the same, we rate the B6's results as really solid. It's still not a TV built to break brightness records, but the HDR effect is strong enough that films really feel like a step up from ordinary SDR picture.

Colour gamut

Using the OLED SE panel has had some impact on wide colour-gamut coverage. Compared with last year's model the figures have dropped by a few percentage points. DCI-P3 reaches about 96%, and BT.2020 around 71%. That doesn't mean the colours on the LG B6 are weak. In most films and TV series they look vivid, well saturated and simply pleasing to the eye. You only notice the difference in very bright, highly colourful scenes. Then colours lose some intensity compared with QD-OLED panels. This is due to the WOLED panel structure. In addition to the red, green and blue subpixels it also uses a white subpixel that helps boost brightness. This comes at a cost: at very high luminance some of the colour is effectively 'diluted' by the white light, so saturation of some hues can be slightly lower. Day-to-day it's not a big problem, but you can see it in the most demanding scenes.

We tested the factory colours in the iFFALCON U85X model in “Film” mode, which is definitely the most accurate among all available settings, although it is still far from perfect. The main issue that catches the eye in both SDR and HDR content is the improper white balance – an excess of blue and red contributes to a slight purple tint in the image, detracting from the naturalness of the film scenes. An even greater challenge is how the television manages its brightness. Analysing the gamma chart for SDR signal, we noticed significant instability: instead of adhering to the standard value of 2.4, the device oscillates around 2.2, then suddenly makes an unnatural jump to around 3.0. In practice, this leads to confusing effects – large, bright surfaces on the screen appear too dark, while smaller elements are unnecessarily brightened. A similar characteristic can be found in the EOTF curve, which makes the image unpredictable and loses its cinematic authenticity.

We tested the LG B6 in Filmmaker Mode, the best picture setting available straight out of the box. ISF modes give very similar results, but in our tests we always stick to Filmmaker Mode for better comparison with other TVs. Each of them is a far better starting point than Vivid or Eco, where the picture is heavily boosted and noticeably less natural. For SDR content the factory settings perform really well. Colour errors are small, gamma behaves correctly, and the picture looks natural during regular viewing and does not seem overly enhanced.

It's a bit worse with HDR. Once you start playing that kind of content it's quickly apparent the white balance isn't perfectly set. Too much blue and red makes the image take on a slightly pink tint. Colour gamut measurements and the ColorChecker confirm this, with samples clearly shifting in that direction. It's not a defect that completely ruins the picture, but you can notice it with HDR films. So anyone who wants the most faithful image should consider calibration, which we cover later in the review.

After professional calibration of the movie mode, we must admit that the effect is more than satisfactory – the iFFALCON U85X undergoes a true transformation here. Colour errors in SDR content have dropped to a level below 2, making them practically undetectable to the human eye. We managed to set the white balance almost perfectly, and brightness management (gamma) has become almost exemplary. As a result, with standard quality materials, the television simply looks perfect and it's hard to fault it.

In the case of HDR signal, the situation has also improved significantly, although here the nature of the device is a bit more noticeable. Colour errors have been reduced to around 3, which is an outstanding result in this price range. It's worth taking a look at the EOTF chart (available on the right side of the screen in filters: 4K HDR, gamma / EOTF) to see what is not immediately apparent regarding brightness management by the U85. Though the reference line looks decent, in actual film scenes the television still interprets the signal “in its own way” due to very aggressive local dimming zone algorithms. Does that disqualify this model for watching HDR content? Absolutely not. It’s simply a typical issue with nearly every Mini-LED that has to balance high brightness with the attempt to maintain deep blacks. One just needs to be aware of these technical limitations, which are unavoidable in this segment.

During calibration we focused mainly on HDR material, because that’s where the factory settings needed the most correction. We didn’t neglect SDR, though. After tuning it was brought almost to perfection. Colours are very accurate and brightness is controlled as it should be. The biggest change in HDR came from improving the white balance. After removing excess red and blue the pinkish tint disappeared and the image became much more natural. Skin tones, whites and all colours that had previously leaned towards pink improved. After calibration most errors fell below Delta E 2-3, the threshold at which an average viewer stops noticing differences with the naked eye. So the LG B6 can produce a very accurate picture, especially for the manufacturer’s entry-level OLED model.

When it comes to scaling images to 4K resolution, the iFFALCON U85X performs solidly. The device effectively boosts low-quality signals, making even older materials look clean and clear on the 4K panel. At extremely low resolutions, such as 480p, you can notice slightly jagged edges (especially on thin lines), but let’s be honest – this is a scenario you'll only encounter while watching very old recordings, so in everyday use, it’s not a real issue.

On the other hand, the digital processing aimed at smoothing tonal transitions performs significantly worse. Although the menu features a function called “Gradual Smoothing”, its effectiveness is at least debatable. In practice, it does not effectively eliminate banding (colour stepping) and, worse yet, can cause more harm than good. This filter can be too aggressive where it shouldn’t be, artificially smoothing out details that shouldn’t be touched, such as the natural texture of the face or the fine details of skin texture. Instead of improving quality, this function can give the image an unnatural, “plastic” look, so it’s best to use it with caution or, preferably: leave it turned off.

LG B6 copes very well with lower-quality material. Much of that is down to effective digital image processing, which can mask some source imperfections without excessively smoothing the whole scene. The "Smooth Gradation" feature proves particularly useful. It lets you noticeably reduce posterization mentioned earlier, especially in dark parts of the image. The safest choice is to set it to Low or Medium. The feature still effectively smooths out harsh tonal transitions, but doesn't yet interfere too much with fine details. Die-hard purists can of course leave it off. Upscaling to 4K also performs very well. Full HD and 720p content retain a fair amount of detail, and the image is neither overly sharpened nor heavily blurred. Some limitations are only noticeable with very poor sources below 720p, where the smallest text and fine elements aren't always perfectly sharp, but this is true for almost every other TV on the market.

Unlike budget constructions that can resemble a slideshow in dynamic sports scenes, the iFFALCON U85X is a heavyweight player equipped with a panel featuring a native refresh rate of 144Hz. It's worth remembering that in the realm of movies, series, or sports, we'll predominantly operate at 120Hz due to the specifics of image enhancement systems. Such a fast panel is excellent news for gamers and sports fans, as it opens the door to advanced motion settings that simply aren't available in cheaper 60Hz models.

Everything is managed from the menu “Motion Clarity”, where instead of using ready-made, often overly aggressive modes, we strongly recommend a custom configuration based on two sliders. The most important of these, Flicker Reduction, is responsible for fluidity in films – here, it's best to aim for a value around 4, which helps maintain the natural, cinematic character of motion without falling into the artificial “soap opera effect.” Meanwhile, the first slider, Motion Blur Reduction, is key to success in sports broadcasts. In this case, it's worth going all out and setting it to maximum, ensuring that the image remains sharp during fast-paced action on the field, while annoying ghosting is eliminated.

One of the biggest advantages of OLED panels is their very fast pixel response time. That keeps the picture sharp and prevents visible smearing that often appears on LCD TVs. It does have a downside, though. During slow camera pans motion can look a bit choppier than on LCD screens, where the slower panel naturally masks some of that effect. Fortunately, on the LG B6 this is easy to tame with TruMotion. With the motion smoothing set correctly you can get smoother motion without giving the picture an exaggerated soap-opera effect.

iFFALCON U85X is an outstanding piece of gear for gamers that has pretty much everything you could ask for from a modern screen for console or PC. It features two full-fledged HDMI 2.1 ports with a full bandwidth of 48 Gbps, which opens the door to key technologies such as VRR and ALLM, ensuring smooth gameplay without screen tearing and with minimal lag. The TV effortlessly handles high refresh rates at various resolutions, and a real curiosity is the mode that allows for up to 240Hz when dropping down to Full HD quality. Everything is managed by the Game Bar (which is a faithful copy from TCL), allowing for instant switching of picture modes, personalization of the interface appearance, or even adding a virtual crosshair in the middle of the screen.

LG OLED B6 has plenty going for gamers; it's a complete base for the PS5, Xbox Series X/S or a solid PC. It comes with four full-size HDMI 2.1 ports with 48 Gb/s bandwidth, so you can forget about annoying cable swapping when you want to connect several newer devices at once. We get a full package of sync technologies, from classic VRR to G-Sync and FreeSync. The panel effortlessly syncs its refresh rate to the frame pacing produced by your console or graphics card. Of course ALLM is present: the B6 automatically recognises when a game is running and immediately cuts latency to a minimum. HDR support is also excellent. The TV supports Dolby Vision, and a correctly implemented HGiG means that after an initial calibration in the console settings the picture won't suffer from blown-out whites or lost detail in bright areas. The icing on the cake is the Game Bar. Instead of digging through the full menu mid-game, a single click lets you correct shadow visibility, tweak chosen parameters or simply check the display's current mode. All of this makes the LG B6 a great choice for gamers.