LG B4: Two-minute review

The LG B4 is the company’s entry-level OLED TV series and follows in a long line of B-series models that provide a high-value option to fans of the best OLED TVs. At $1,699 / £2,099 / AU$2,999 for the 65-inch model I reviewed, the B4 is a sensible TV option for those who don’t want to spend big bucks on flagship models like the LG G4 and Samsung S95D, and also don’t want to deal with the shortcomings of mid-range mini-LED TVs – poor off-axis picture quality and limited gaming features to name just two.

A huge gaming upgrade the LG B4 gets over last year’s LG B3 is four sets of HDMI 2.1 ports compared to the B3’s two HDMI 2.1 connections. Otherwise, it uses a similar W-OLED display panel that doesn’t provide a picture brightness upgrade. That’s not to say the B4 doesn’t have an impressive picture – a new Alpha 8 AI processor with Dynamic Tone Mapping Pro and AI Super Upscaling features helps bring out the best in 4K and lower-resolution movies and TV shows, and it also provides sound quality benefits such as 9.1.2 virtual surround processing.

Sound quality isn’t a B4 strong point, so if you’re a movie fan or just like to crank the volume up loud, you’ll benefit from pairing it with one of the best soundbars. It also has a basic design, with support feet instead of the premium aluminum pedestal stand found on the step-up LG C4, and HDMI inputs split between side and back panel sections – an arrangement that makes a flush wall-mount installation more challenging. It does come with LG’s Magic Remote control, however, and it’s one of the best in the business for navigating smart TV menus.

Speaking of that, LG’s webOS 24 has a more streamlined layout than last year’s webOS 23 and features the same Quick Cards for conveniently browsing apps by category among other functions. A big portion of the home screen is devoted to ads, however, which seems to be the norm for smart TV homescreen layouts these days.

The B4’s four HDMI 2.1 ports support 120Hz pass-through, VRR (with Nvidia G-Sync and AMD FreeSync), and 4K Dolby Vision gaming. Combine that with the TV’s extensive cloud gaming options, which include GeForce Now, Amazon Luna, Utomik, Blacknut, and Boosteroid, and low 9.1ms input lag, the B4 comes off as a relatively budget powerhouse among the best gaming TVs.

Which brings us to the topic of value. If you’re looking for a great gaming TV at a reasonable price, the LG B4 easily qualifies. Otherwise, its value is undercut somewhat by the LG C4, which might be a clear step up in price, but is available in a wider range of sizes, provides even more gaming features, and has a significantly brighter picture.

LG B4 review: Price and release date

• Release date:  March 2024 
• 48-inch: $800 / NA / NA
• 55-inch: $1,399 / £1,399 / AU$2,199
• 65-inch: $1,699 / £2,099 / AU$2,999
• 77-inch: $2,699 / £3,099 / NA

The LG B4 series is the company’s entry-level OLED line, slotting just beneath the mid-range LG C4 series. B4 series OLED TVs were released in March 2024 in 48, 55, 65, and 77-inch screen sizes, though the availability of the 48-inch model appears to be limited to the US and a single retailer (Best Buy) at the time of writing. The 77-inch model also doesn’t appear to be available in Australia.

There’s a notable gap between LG’s entry-level and mid-range OLED TVs, with the 65-inch B4 I tested priced at $1,599 / £2,099 / AU$2,999 and the 65-inch C4 selling for  $1,999 /  £2,099 / AU$3,499. 

Strangely, prices for both models in a 65-inch size were equivalent in the UK, though will probably change over time since TVs are discount so quickly these days. The current prices LG has listed are discounted from the original suggested prices, and you can expect to see them drop further as we near the end of 2024.

LG B4 review: Specs

LG B4 review: Benchmark results

LG B4 review: Features

• Standard W-OLED panel and Alpha 8 AI processor
• New Dolby Vision Filmmaker mode
• Four HDMI 2.1 inputs with 4K 120Hz support

The LG B4 uses a standard W-OLED panel and has the new Alpha 8 AI processor also found in the company’s top-tier mini-LED TVs for 2024. This features Dynamic Tone Mapping Pro and AI Super Upscaling with face detection for pictures, and AI Sound Pro for 9.1.2-channel virtual surround processing over the TV’s 2.0-channel speakers. B4 series TVs also have an anti-reflection screen that effectively reduces glare from bright room lights.

HDR support for the B4 series includes Dolby Vision (with Dolby Vision IQ), HDR10, and HLG formats. A new Dolby Vision Filmmaker Mode makes its debut on 2024 LG OLED TVs, and this helps by disabling the motion smoothing that’s typically applied by default in Dolby Vision modes on other TVs.

A new and welcome addition to LG’s B-series OLED TVs is four HDMI 2.1 inputs, which lets you connect both Xbox Series X and PS5 consoles to the TV along with one of the best soundbars via HDMI eARC. These all support 4K 120Hz, VRR, ALLM, and Quick Media Switching (QMS), a feature that enables seamless frame rate matching when connected to a compatible source such as an Apple TV 4K (2022). 

LG’s webOS 24 smart TV platform is used for streaming on the B4 and it includes a wide range of apps including, Netflix, Prime Video, Disney Plus, Max, and more (but sadly not The Criterion Channel in the US). Cloud gaming is also supported, with apps including GeForce Now, Amazon Luna, Utomik, and Blacknut. LG’s Quick Cards, which give you easy access to app categories like Home Office, Games, Music, Home Hub, and Sports, get a refreshed layout in webOS 24 with the cards now cutting horizontally across the home screen’s center. Both AirPlay and Chromecast built-in are onboard for wireless streaming, and there’s your choice of Alexa or Google Assistant for voice commands.

• Features Score: 4.5/5

LG B4 review: Picture quality

• Average brightness for an OLED TV
• Very good overall picture quality
•  Anti-reflection screen

With a standard W-OLED panel rather than the OLED Evo (with Brightness Booster) one found in the LG C4, I didn’t expect the LG B4 to beat last year’s B3 when it came to brightness, and my measurements confirmed that. With the B4 in Filmmaker mode, peak HDR brightness measured on a white window test pattern covering 10% of the screen area was 656 nits, and a full-screen pattern measured 128 nits. Those are expected results for an entry-level OLED TV, although OLED TVs are generally getting brighter, with the C4 yielding results of 1,065 nits and 202 nits, respectively on the same brightness tests, so there's a massive leap in contrast and fullscreen brightness if you step up to the pricier model.

Otherwise, the B4’s lab performance was excellent. UHDA-P3 color space coverage in Filmmaker mode was 98.9% and BT.2020 coverage was 74%, results that basically match the performance of the C4. The B4’s averaged Delta-E values, which are used to determine grayscale and color accuracy, were 2.9 and 1.6, respectively. Once again, those numbers match our results for the C4 and are within the threshold we look for TVs to hit (we're happy with anything under 3.0)

The LG B4’s anti-reflection screen proved effective when watching with overhead lights on, with little to no glare visible even with TV shows with mostly dark, shadowy images like House of the Dragon on Max. I’ve recently tested several mini-LED TVs with stunningly high brightness such as the Hisense U8N and TCL QM815G. Compared to these, the B4 with its limited peak brightness lacked the same dynamic picture those sets delivered for daytime viewing, though the picture looked crisp and had rich color and great detail even when viewing upconverted non-4K TV shows.

I generally watch with my room lights dimmed and in those conditions, the B4’s picture revealed a high contrast range, along with exceptional shadow detail. This could easily be seen in the interior scenes from House of the Dragon, and it also helped to bring out the dynamic quality of the black-and-white images from Ripley on Netflix. And when I streamed Godzilla Minus One in 4K with Dolby Vision on Netflix, the subtle color range of this kaiju movie set in post-World War II came through perfectly thanks to the TV’s Dolby Vision Filmmaker Mode, which provides an accurate, director-approved presentation without having to muck with picture adjustments.

OLED TVs typically excel at motion handling and the LG B4 is no exception. When I watched a scene from the James Bond film No Time to Die where the camera pans to follow Bond crossing a cemetery on a rocky landscape, the picture looked solid and was impressively judder-free. The same held for a subsequent sequence where Bond is chased through city streets on a motorcycle in an action-packed high-speed chase.

• Picture quality score: 4/5

LG C4 review: Sound quality

• 2-channel speaker system
• 9.1.2-channel virtual Dolby Atmos
• Decent sound but limited bass

The LG B4 has a basic 2.0-channel built-in audio system that uses down-firing speakers. Audio features are limited compared to other LG OLED TVs, but the B4 can output audio wirelessly to a Bluetooth speaker or headphones, and it also supports both Wowcast for lossless wireless Dolby Digital output to LG soundbars and wireless speakers, and WiSA, which does the same for WiSA-enabled speakers.

Otherwise, the B4 has an automatic volume adjustment feature to maintain a constant volume level when switching TV channels. It also has an equalizer adjustment and an AI Sound Pro mode that converts sound to virtual 9.1.2-channel Dolby Atmos.

Sound from the B4’s built-in speakers has decent balance and dialogue comes across as clear. It becomes a bit thin and edgy when you raise the volume, however, and there’s not much of a directional effect with Atmos soundtracks, even in the TV’s Theater sound mode. Selecting the AI Sound Pro mode, which provides virtual 9.1.2-channel upmixing of soundtracks, gave the sound a better sense of spaciousness, but it also thinned out the set’s already challenged bass and made dialogue overly crisp.

• Sound quality score: 3.5/5

LG B4 review: Design

• Aluminum support feet
• Side and back panel input sections 
• Magic Remote control

The LG B4 uses a set of aluminum feet for support, and although they aren’t height- or width-adjustable, they are a design step up from the plastic pedestal stand used for last year’s B3. The feet provide sturdy support for the TV, which is otherwise a thin display panel with an input section protruding two inches out from the back.

A thin bezel surrounds the B4’s screen, giving it the same “all-picture” look as the C4. Connections on the back are split between two sections: one side-mounted with two HDMI 2.1 ports, a USB type-A port, and an antenna input; and the second back-mounted with with two HDMI 2.1 ports,  a USB type-A port, an optical digital output, and RS-232 and Ethernet ports for control. 

The Magic Remote that comes with the B4 gives you the choice to either point-and-click on apps and menu sections or traditionally scroll through them using navigation buttons. It has direct access buttons for the Netflix, Prime Video, Disney Plus, Sling, and LG Channels apps, and there’s one to activate Alexa. A centrally located button activates the built-in mic for voice commands when pressed.

• Design score: 4/5

LG B4 review: Smart TV and menus

• Streamlned Quick Card layout
• App selection can be customized
• Quick Menu for easy setup

LG’s webOS 24 smart interface is one of the best ones going, and it features a few modifications over webOS 23. The main one is a new streamlined look for Quick Cards section, with the categories – Games, Music, Home Hub, Sports, Accessibility, and Home Office – running horizontally across the middle of the screen. These let you easily access related apps or each category, and the Home Hub one lets you set up Matter-compatible devices such as smart lights and cameras for control via the TV.

Other elements of the main webOS screen include a horizontal row of apps running beneath the screen, with most major ones such Netflix, Disney Plus, Prime Video, Apple TV Plus, and Max represented. The selection and arrangement of these can be customized, making it easy to access the ones you want. Unfortunately, there’s a large banner at the top third with a rotating array of ads, but to be fair, most smart TV interfaces feature some degree of promoted content.

I really like LG’s Quick Menu, which appears as a vertical panel with various settings such as picture mode, pixel brightness, sound mode, sound output, and more when you press the gear icon on the remote control. Clicking on another gear icon in the Quick Menu calls up another settings menu, with advanced settings that let you perfectly dial in the TV’s picture. Another new feature in webOS 24 is an onscreen chatbot that covers a wide range of topics related to setup and use of the TV and even speaks to you.

• Smart TV & menus score: 4.5/5

LG B4 review: Gaming

• Four HDMI 2.1 ports
• Cloud-based gaming apps
• Low 9.1ms input lag (Boost mode)

While last year’s LG B3 topped out at two HDMI 2.1 ports, the LG B4 ups that number to four with support for 4K at 120Hz, VRR (with Nvidia G-Sync and AMD FreeSync), and 4K Dolby Vision gaming present on all of them. The inclusion of four HDMI 2.1 ports is a major upgrade when it comes to flexibility and future-proofing, and it makes the B4 an excellent gaming TV for the price. 

Cloud-gaming apps located in the Games Quick Card include GeForce Now, Amazon Luna, Utomik, Blacknut, and Boosteroid. Any connected game console will also show up here, where it can be easily selected.

The B4 will automatically switch to Game Optimizer mode when an active console is detected. You can also press the gear icon on the remote to call up the Game Menu, a transparent bar overlay at the bottom of the screen that shows frame rate, VRR status and other information, and provides quick access to game genre picture and sound presets, dark area adjustment and more. With Game Optimizer on, the B4’s input lag measured an excellent 11.9ms, and 9.1ms with Boost mode enabled.

• Gaming score: 5/5

LG B4 review: Value

• Least expensive LG OLED TV series
• LG C4 not much more money 
• Better value for gamers

The 65-inch LG B4 I tested costs $1,699 / £2,099 / AU$2,999. That’s a fair price for an OLED TV with average brightness but overall excellent picture quality and a fantastic suite of gaming features. And the 48-inch version is an even better value at $800 – if you can find one. 

The value of the B4 is made a bit problematic by LG’s own C4 series OLED. That model offers significantly higher peak brightness than the B4. It also has a more elegant design with a pedestal stand as opposed to the B4’s support feet and features Nvidia 144Hz certification – an important feature for PC gaming.

Any one of those factors could impact your decision to buy the C4 instead, which for the 65-inch model is priced not all that much higher at $1,999 /  £2,099 / AU$3,499 (oddly, 65-inch B4 and C4 prices are equivalent in the UK). Even so, the B4 remains a very good value for what it offers, and most people – gamers especially – will be pleased with its features, picture, and basic sound quality. 

• Value score: 4/5 

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How I tested the LG B4 OLED TV

• Tested over the course of two weeks
• Measurements were made using Calman color calibration software
• A full calibration was made before proceeding with subjective tests

When I test TVs, I first first spend a few days or even weeks using it for casual viewing to assess the out-of-box picture presets and get familiar with its smart TV menu and picture adjustments. I next select the most accurate preset (usually Filmmaker Mode, Movie or Cinema) and measure grayscale and color accuracy using Portrait Displays’ Calman color calibration software. The resulting measurements provide Delta-E values (the margin of error between the test pattern source and what’s shown on-screen) for each category, and allow for an assessment of the TV’s overall accuracy.

Along with those tests, I make measurements of peak light output (recorded in nits) for both standard high definition and 4K high dynamic range using 10% and 100% white window patterns. Coverage of DCI-P3 and BT.2020 color space is also measured, with the results providing a sense of how faithfully the TV can render the extended color range in ultra high-definition sources.

For the LG B4, I used the Calman ISF workflow, along with the TV’s advanced picture menu settings, to calibrate the image for best accuracy. I also watched a range of reference scenes on 4K Blu-ray discs to assess the TV’s performance, and 4K HDR shows streamed from Max, Netflix, and other services.

You can read an in-depth overview of how we test TVs at TechRadar at that link.

• First reviewed: August, 2024
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