The LG B4 OLED is LG's entry-level TV in their 2024 OLED lineup. It sits below the LG C4 OLED and uses LG's α8 AI Processor 4K, which is designed to provide better image processing and can automatically optimize the TV's picture and sound settings. Only two of the four HDMI ports on 2023's LG B3 OLED had HDMI 2.1 bandwidth, but this 2024 model has HDMI 2.1 bandwidth on all four HDMI ports. The TV adds 'Filmmaker Mode' as a picture setting for Dolby Vision, designed to preserve the content creator's intent without needing to change any settings. The TV uses the 2024 version of LG's webOS, and it has a 20W 2.0 channel speaker built-in that can be virtually up-mixed to 9.1.2 using the α8 AI Sound Pro feature. LG is releasing the B4 in a new, smaller 48-inch model, which in the past was only available in their C-Series lineup and their discontinued A-Series lineup. It's available in five sizes: 48-inch, 55-inch, 65-inch, 77-inch, and 83-inch.
Our Verdict
The LG B4 is very good for mixed usage. Unfortunately, the TV isn't bright enough and doesn't have the reflection handling needed for a bright room, so it's best suited for a moderately lit environment. However, it's well-suited for use in reference conditions like a home theater since it has vibrant colors, perfect blacks, and incredible accuracy. It lacks some brightness in HDR to fully display highlights in some very bright content, but most HDR content looks excellent. The TV is also a solid option for gaming, thanks to its modern gaming features and sharp motion. Finally, it's a solid option for watching content with a group of friends due to its wide viewing angle.
Near-infinite contrast ratio for perfect blacks with no blooming around bright highlights.
Incredibly wide viewing angle for a consistent image from the sides.
Colors are vibrant, lifelike, bright, and accurate.
Direct reflections are distracting.
Lacks the SDR brightness needed to overcome glare in a bright room.
The LG B4 is great for a home theater. It's an OLED, so you get those perfect black levels with no blooming. The TV's HDR brightness is decent enough that highlights stand out against darker backgrounds, and it displays vibrant and lifelike colors with minimal banding, so HDR content is impactful. Furthermore, it respects the intent of the content creator when it comes to the brightness of HDR content, so you don't get an over or under brightened image. The TV has great upscaling capabilities, and it does well cleaning up artifacts in heavily compressed media, which is great when the quality of your content isn't ideal. Unfortunately, due to the TV's nearly instantaneous response time, there's noticeable stutter in movies and TV shows.
Near-infinite contrast ratio for perfect blacks with no blooming around bright highlights.
Colors are vibrant, lifelike, bright, and accurate.
Does a very good job upscaling and cleaning up low-quality content.
Removes judder from the internal apps and modern streaming devices.
Very noticeable stutter due to the TV's fast response time.
The LG B4 is adequate for a bright room. The TV struggles to reduce the intensity of direct reflections, so it's not a good choice if you have wall lights, lamps, or a window opposite the screen. However, blacks remain deep, and colors remain well-saturated in ambient lighting, so you don't lose a ton of picture quality when you have your lights on. Unfortunately, the TV is only bright enough to fight glare in moderately lit rooms.
Blacks remain deep and colors stay vibrant in a room with ambient lighting.
Direct reflections are distracting.
Lacks the SDR brightness needed to overcome glare in a bright room.
The LG B4 is decent for watching sports. Unfortunately, the TV isn't very bright in SDR and struggles with direct reflections, so it's not the best option for watching the game on a sunny afternoon with the curtains open. However, there's barely any dirty screen effect in the center of the screen thanks to its very good uniformity, and motion is smooth and clear due to its fast response time and clean transitions. It does a very good job upscaling SD and HD broadcasts and streams, and it does well smoothing out artifacts when watching games with a lot of compression. You also get vibrant and accurate colors, so your favorite teams' jersey looks the way it should. Its wide viewing angle means the image doesn't degrade when viewed from the sides of the screen, which is great for watching the game with a group of friends.
Incredibly wide viewing angle for a consistent image from the sides.
Nearly instantaneous pixel transitions for no noticeable blur behind fast motion.
Colors are vibrant, lifelike, bright, and accurate.
Does a very good job upscaling and cleaning up low-quality content.
No transition artifacts.
Direct reflections are distracting.
Lacks the SDR brightness needed to overcome glare in a bright room.
The LG B4 is great for gaming. Its HDR brightness is only decent, so highlights aren't super bright in HDR games, but those games are still impactful thanks to the TV's perfect black levels and vibrant colors. The TV has HDMI 2.1 bandwidth on all four ports for up to 4k @ 120Hz, and it supports all three popular versions of VRR to reduce screen-tearing, which makes it fully compatible with modern consoles. It also has low input lag and nearly instantaneous pixel transitions, so gaming feels very responsive.
Nearly instantaneous pixel transitions for no noticeable blur behind fast motion.
Colors are vibrant, lifelike, bright, and accurate.
The LG B4 has alright brightness overall. Its SDR brightness is good enough to overcome glare in a moderately lit room, but it's not bright enough for a well-lit room. Highlights in HDR content pop out enough to deliver a solid HDR experience, but the TV is too dim to fully display very bright highlights at the intended level of brightness.
Lacks the SDR brightness needed to overcome glare in a bright room.
Since the LG B4 is an OLED, it has perfect black levels. Blacks are deep and inky when viewed in a dark room, with no blooming around bright highlights.
Near-infinite contrast ratio for perfect blacks with no blooming around bright highlights.
The LG B4 has impressive colors. It has solid color volume overall, so colors are vibrant and lifelike, but it does struggle more with displaying very light colors. Fortunately, this is an incredibly accurate TV in both SDR and HDR that respects the content creator's intent without needing calibration.
Colors are vibrant, lifelike, bright, and accurate.
The LG B4 OLED has decent motion handling when watching all types of content. The biggest downside is that it doesn't remove judder from 60Hz signals, so motion looks a jittery if you're watching from an older streaming device or cable box. However, the TV is completely judder-free if you're using the internal apps or most modern streaming devices, and it's free from micro-judder with all sources. Motion is very clear due to the TV's nearly instantaneous response time and perfect transitions, so there are no artifacts around objects and people in fast-paced scenes and sports. Unfortunately, there's stutter that's most visible during slow panning shots, but this is true of any OLED TV.
No transition artifacts.
No micro-judder in scenes with complex motion.
Perfect lighting zone transitions.
Removes judder from the internal apps and modern streaming devices.
Very noticeable stutter due to the TV's fast response time.
The LG B4 has outstanding responsiveness while using the Game Optimizer. The TV's input lag is very low across the board, and it supports VRR for a nearly tear-free experience, so gaming feels responsive. It also has nearly instantaneous pixel transitions, which makes fast motion very clear.
Nearly instantaneous pixel transitions for no noticeable blur behind fast motion.
Note: We're in the process of improving our tests related to image processing, but this score should give you a general idea of how a TV performs overall with its image processing capabilities.
The LG B4 has great image processing overall. The brightness of HDR content is very accurate, so it stays true to the content creator's intent, and color gradients are smooth with minimal banding. It does a very good job upscaling low-resolution content so it doesn't look too soft. The TV's low-quality content smoothing reduces the amount of artifacts you see in low bitrate content, but it doesn't eliminate them completely.
Does a very good job upscaling and cleaning up low-quality content.
Exceptional HDR brightness accuracy.
Performance Usages
Changelog
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Updated Mar 17, 2026:
We added text to our new Cinematic Motion Handling performance usage and our new Transition Artifacts and Stutter Reduction Via Interpolation test sections after converting the review to TV 2.2.
- Updated Mar 10, 2026: This review has been updated to TV 2.2. We've added new sections for Transition Artifacts and Stutter Reduction Via Interpolation, and updated the way we test Stutter. Additionally, we removed the 'Broken' disclaimer from our Motion Handling usage.
- Updated Feb 05, 2026: We added text to the new Micro-Judder section and refreshed the text in the updated Judder and Response Time Stutter sections after converting the review to TV 2.1.
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Updated Jul 25, 2025:
We mentioned the newly reviewed LG B5 OLED in the SDR Color Volume section of this review.
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Differences Between Sizes And Variants
We tested the 65-inch LG B4 (OLED65B4PUA), and the results are also valid for the 55-inch and 77-inch models. The 48" model performs mostly the same but isn't quite as bright as the larger models. The last three letters in the model number (PUA in this case) vary between retailers and individual regions, but there's no difference in performance. The variant that carries the suffix 'AUA' supports Wi-Fi 6E (the PUA variant has Wi-Fi 5).
The 83-inch model shares a lot of similarities with the LG C4 OLED. It uses LG's Alpha 9 AI Processor Gen7, supports a 144Hz refresh rate, has three USB ports, and has a 2.2 channel speaker system, all of which are the same as the C4. Due to these shared features, we expect the 83-inch model to perform more in line with the C4. However, it doesn't have LG's Brightness Booster technology like the C4 does, so it isn't as bright overall.
| Size | US Model (Wi-Fi 5) | Variant (Wi-Fi 6E) |
|---|---|---|
| 48" | OLED48B4PUA | OLED48B4AUA |
| 55" | OLED55B4PUA | OLED55B4AUA |
| 65" | OLED65B4PUA | OLED65B4AUA |
| 77" | OLED77B4PUA | OLED77B4AUA |
| 83" | OLED83B4PUA | OLED83B4AUA |
Our unit was manufactured in March 2024.
Popular TV Comparisons
The LG B4 OLED is an excellent entry-level OLED and has noticeable improvements over the LG B3 OLED. The biggest difference is its increased brightness in both SDR and HDR, which makes it more suitable for a brighter room, and it delivers a more impactful HDR experience than its predecessor. The B4 doesn't really have any direct competitors, since most OLEDs from brands like Sony, Panasonic, and Samsung are more in line with the LG C4 OLED price-wise. This makes it an excellent choice for those on a budget who need a solid TV for their home theater. It's also great for gamers looking to get their first OLED TV, especially since it has HDMI 2.1 bandwidth on all four of its ports and is available in a 48-inch model.
For more options, check out our recommendations for the best OLED TVs, the best bedroom TVs, and the best 48-49-50 inch TVs.
The LG B4 OLED and LG B5 OLED are nearly identical, but the older model is actually a bit brighter in SDR than its replacement. However, the B5 is the brighter option in HDR. The B5 handles direct reflections a bit better, but the older B4 has the edge when dealing with ambient or mixed light sources, but barely. While the B5 supports the 6Ghz Wi-Fi band, with the B4 being limited to 5Ghz and 2.4Ghz, the newer model isn't worth the upgrade, or added cost, over the older set.
The LG C4 OLED is better than the LG B4 OLED for the most part. The C4 has better reflection handling and slightly better SDR peak brightness, so it handles a bit more glare in a bright room, and it has better low-quality content smoothing. The C4 also gets brighter in HDR in most picture modes, making highlights pop more in HDR content. However, the two TVs have very similar HDR brightness while using the Game Optimizer picture mode.
The LG C5 OLED is better than the LG B4 OLED. The C5 is quite a bit brighter in most scenes, delivering a more impactful HDR experience as bright specular highlights stand out better. Colors are also more vibrant overall, and the C5 has better color volume. Finally, although this doesn't benefit everyone, the C5 has a higher maximum refresh rate. This doesn't matter for console gamers or for watching TV in general, but it's a slight improvement for PC gamers.
The LG B4 OLED and the LG C3 OLED are very similar overall. The C3 has better low-quality content smoothing, and its viewing angle is a bit better, with less color shift as you move off-center. The C3 also gets brighter overall, so it overcomes a bit more glare while watching SDR content in a bright room, and highlights stand out a bit more in HDR content. However, the C3 is noticeably dimmer while using the Game Optimizer, whereas the B4 maintains its brightness in that mode, which makes it a bit brighter overall while using Game Optimizer.
We buy and test dozens of TVs yearly, taking an objective, data-driven approach to deliver results you can trust. Our testing process is complex, with hundreds of individual tests that take over a week to complete. Most of our tests use specially designed test patterns that mimic real content, but we also use the same sources you have at home to ensure our results match the real-world experience. We use two main tools for our testing: a Colorimetry Research CR-100 colorimeter and a CR-250 spectroradiometer.
Test Results
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