LG C6 42-inch (OLED42C6) review

LG’s 42-inch OLEDs have remained our top choice for space-conscious cinephiles for quite some time. They prove that you don’t need to sacrifice a large amount of space for a 65-inch (or larger) set to achieve a top-of-the-line picture experience.

While there haven’t been huge performance leaps between generations, we have found subtle improvements occur each year, and we expect to see a similar affair with the 42-inch C6 that we have before us today.

This compact OLED aims to deliver a large-scale cinematic experience that suits smaller rooms, which is a mission we’re more than familiar with after reviewing every generation of this TV since 2022’s C2; the first 42-inch OLED to hit the market.

The real question is, does it continue the legacy of the acclaimed series that’s been championed by cinephiles and gamers alike? We certainly think so…

Price

Originally launching at £1300 / $1399 / AU$1999, the OLED42C6 can now be found for around £999 / $1000 / AU$1695 thanks to months of discounts. Going back to that launch price, LG actually undercut the outgoing 42-inch C5, which launched at £1400 / $1399 / AU$2199, making it cheaper in the UK and Australia.

Speaking of which, there are still some C5 stragglers to be found for around £849 here in the UK. That’s a decent discount, but we could certainly make a case for spending the additional £150 to score the latest and greatest C-series TV.

Looking at the competition, LG’s main rival is, perhaps unsurprisingly, Samsung. The Samsung S90H is available in all the same sizes as the LG C6, with the equivalent 42-inch model currently available for £999 / $1000 / AU$1466.

Panasonic also offers last year’s Z90B, which we awarded five stars at 48 inches, in a 42-inch option. It costs slightly more than the C6 at £1099, but the Z90B’s front-firing speaker bar may appeal more to audiophiles.

Design

Place the 42-inch C6 next to the C5, C4, C3 and C2 from the previous five years, and you’d have a nearly impossible game of Where’s Wally on your hands. The C6 looks identical to its predecessors, although that’s no great shame as LG is sticking with a well-built and smart-looking formula.

The compact set rests upon two blade-style feet at each end; usually we prefer a central stand (as found on the C6 from 48 inches upwards) for maximum furniture compatibility, but the small footprint of this TV means that it’s not too wide and should fit on a majority of media units with ease.

And with 72cm between these feet, there is enough room to squeeze a soundbar between them; the Sonos Beam (Gen 2), for example, measures in at 65cm, meaning it should easily fit.

However, we should note that the feet can only be attached at one height, that being 3.7cm. That’s not loads of clearance; going back to the Sonos Beam (Gen 2), that soundbar stands at 6.8cm tall, so there is a chance that your soundbar may encroach on the C6’s bezel.

Assembly is simple thanks to the feet attaching with just two screws each, and the “small” screen size is easy for a single person to get into position provided they possess the appropriate wingspan.

Rounding things out with the remote, LG continues to offer just one button-heavy handset in the box. Its Magic Remote has some nifty features, such as a scroll wheel and Nintendo Wii-style motion pointer, but we’d still like to see a backlight and the return of a dedicated source select button, which has unfortunately been sacrificed for a general smart home-focused connected devices button.

Features

The 42-inch C6, much like the 48- and 65-inch versions, is a feature-packed OLED TV that’s equipped for cinephiles and gamers alike.

This TV sports a 4K WOLED panel, as has been the case with all previous iterations of LG’s 42-inch C-series TVs. While that may seem somewhat obvious given LG’s track record, it is worth highlighting this year, as LG seems to be mixing in Primary RGB Tandem OLED panel technology depending on the screen size.

Officially speaking, the 77- and 83-inch options tout LG’s Brightness Booster Max feature and Hyper Radiant Colour system, which require the Tandem OLED technology to work. On a more speculative note, we recently reviewed the 48-inch version of this TV, and its unexpectedly high brightness led us to believe that it too is using the more advanced panel technology, although LG will neither confirm nor deny whether that is the case.

Regardless, our main concern is how this TV performs, as panel technology and on-paper specifications are not always indicative of picture performance.

Moving on to the processor, the OLED42C6 sports the same Alpha 11 AI Processor 4K Gen3 as its larger siblings, which handles picture processing and runs the webOS smart platform. New for this year is a 12-bit processing pipeline, which reportedly enhances brightness and colour.

There are also countless AI picture and sound features, which are handled by this processor. Dual AI Super Resolution, for example, is a two-layer upscaling system (one for sharpening edges, the other to refine textures and details), which enhances lower-resolution content as well as 4K content.

AI HDR Remaster, another AI-backed persistent picture feature, enhances contrast, sharpness and colour using a frame-by-frame process. SDR content takes on a more HDR-like appearance, and HDR content should look “more vibrant and realistic”, according to LG.

AI Picture Pro serves as a hub for many of these picture features, and it also uses content recognition algorithms to tweak the C6’s settings depending on the content you’re watching. Alongside this is AI Sound Pro, which works in a very similar way, albeit for the audio settings instead.

For those hoping to add a more personalised touch to their AI experience, Personalised Picture Wizard and Personalised Sound Wizard allow you to choose from a range of preset image and sound samples to adapt the settings to best suit your taste without having to dig into the system settings menu.

That said, we find that LG’s AI settings can be a bit heavy-handed and usually don’t preserve picture and sound authenticity. Switching to Filmmaker Mode in the picture settings is a much more effective and equally easy way to dial this TV’s picture in.

Stepping away from AI and back to the realm of AV, the 42-inch C6 supports HDR in the HDR10, HLG and Dolby Vision HDR formats. HDR10+ isn’t supported, which isn’t a surprise considering the format was created by Samsung.

Dolby Atmos immersive audio is also supported via the 2.0 channel sound system and through connected HDMI eARC audio devices.

Speaking of HDMIs, LG’s established formula for winning over gamers remains, as the OLED42C6 sports four full-bandwidth HDMI 2.1 sockets capable of handling signals up to 4K/165Hz with VRR and ALLM. For those without a console, the C6 also supports a wide range of cloud gaming apps, including Xbox, Nvidia GeForce Now and Amazon Luna. LG claims that the C6 is also the first TV capable of 4K/120Hz game streaming via Nvidia GeForce Now.

webOS 26 is also home to plenty of non-gaming-related streaming apps too, including a strong array of regional and global offerings, from BBC iPlayer and Channel 4 to Disney+ and Apple TV. Our biggest criticism is how advertisement-heavy the operating system is, but sponsored content can be switched off in the settings menu.

Picture quality

While the 48-inch C6 surprised us with its bright, rich and punchy performance, the 42-inch C6 follows in the footsteps of its 65-inch sibling by acting as a subtle but appreciated improvement over its predecessor. That’s to say it's a refinement on a five-star formula in the picture department, which is fine.

As has been the case with several previous C-series OLEDs, we gravitate towards Filmmaker Mode as our preferred picture setting, although we do switch to Cinematic Movement in the TruMotion settings as we feel this irons out judder effectively without introducing the soap opera effect.

LG’s Cinema Home setting – which is essentially its version of the “movie” preset found on other TVs – is also a setting that’s worth exploring for those who crave a touch more punch, or who are viewing the C6 in environments with abundant ambient light.

With these settings dialled in, the 42-inch C6 serves up a superb cinematic image that never reminds us that we’re watching a “small” TV.

Much like the 65- and 48-inch versions of the C6, the 42-inch excels when it comes to contrast. The opening of F1: The Movie features impressively punchy highlights, including stadium lighting and fireworks, which juxtapose the inky-black night sky effectively.

There is an impressive sense of depth, solidity and richness to the picture as Sonny Hayes waltzes towards the garage and pit lane during the opening of the film, which, when paired with the sharp outlines of subjects and strong detail levels, develops an excellent sense of immersion.

Switching to Civil War, the C6 proves it can deliver a balanced, natural image during the military base sequence. Foliage looks crisp and verdant without straying into over-vibrant shades of green, and there is a real sense of three-dimensionality to the picture too.

As fighter jets soar over the camp, we find that the 42OLEDC6 takes fast-moving objects in its stride, with no apparent judder. Switching to Blade Runner 2049 affirms this, as a sequence in which Officer K’s flying Peugeot hurtles towards the LAPD and passes behind a handful of buildings in the foreground reveals no artefacts or flickering motion.

Simply put, the 42-inch C6 ticks every box in our picture testing process, and its large-scale cinematic picture isn’t held back by its modest display size.

Sound quality

LG’s small OLED TVs have never blown our socks off when it comes to sound performance, and the C6 isn’t really an exception. That said, it’s not a total disaster either; it’s more of a mixed bag, if anything.

We do like that the sound presets are pleasingly simple, and things become even easier with our guidance: skip the AI-labelled sound modes and stick with standard. While they aren’t without use (the dialogue setting will certainly be handy for those who struggle to hear voices, for example), they do compromise the overall mix and apply a synthetic finish to the sound. Our advice is to stick with “standard”.

With that in mind, we use the opening sequence of F1: The Movie to assess the C6’s performance. Overall, there are a few strengths to note here; the C6 produces quite a clear and detailed sound, which especially extends to voices. While they don’t project all that well, there is certainly definition and a touch of tonal variation, which is appreciated given dialogue really is the most important factor.

Furthermore, the sound of race cars soaring around the track (and, from our perspective, across the screen) flows nicely from right to left, and there is a sense of spaciousness and openness that is quite impressive given the size of the set. The sound doesn’t fill our testing room, but we have to commend the sense of space it is able to muster given its speaker configuration.

While there isn’t a huge amount of height to the fireworks that burst over the race track and shower sparks onto the cars below, the C6 presents them with satisfying snaps, crackles and pops; although, much like Rice Krispies, there isn’t much weight behind them.

And that brings us onto the overarching issue with the 42 C6’s sound: there just isn’t much oomph. Given that this is a 2.0 channel, subwoofer-less system in a relatively small chassis, that’s to be expected, but it isn’t helped by the shortfall of absolute volume. When cranked to 100 per cent, it remains easy to talk over the C6 without having to raise your voice, and there is a dip in the midrange that leaves the sound (especially voices) feeling a bit hollow and lightweight.

Paired with a somewhat drab approach to dynamic expression, which leaves Led Zepplin’s Whole Lotta Love sounding flat, the C6 is best accompanied by a compact Dolby Atmos soundbar for serious movie watching sessions.

Verdict

The 42-inch LG C6 once again proves that you don’t need a huge TV to score genuine cinematic impact.

Middling sound aside, the C6 delivers a seriously impressive experience, underpinned by a composed approach to contrast and sharpness, resulting in oodles of cinematic depth.

While we’re used to sets 55 inches and above, we’d happily spend hours watching movies on this compact OLED.

SCORES

• Picture 5
• Sound 3
• Features 5

MORE:

Read our review of the LG C6 48-inch

Also consider the LG C5 42-inch

Read our Panasonic Z90B 48-inch review

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