LG B4 OLED77B4PUA 77"
The self-lit OLED panel with the α8 AI Processor delivers infinite contrast and luminous color accuracy, while the near-invisible bezel creates a seamless, ultra-slim aesthetic. It doubles as a high-performance gaming display with a 120Hz refresh rate, 0.1ms response time, and full support for NVIDIA G-Sync and AMD FreeSync across four HDMI 2.1 ports. This 77-inch screen is best for console and PC gamers who also want a premium, processor-enhanced cinematic experience for streaming and movies.
Snapshot
The 30-Second Version
The 77-inch LG B4 is the value king of OLEDs. You get perfect blacks, a killer 120Hz gaming experience with four HDMI 2.1 ports, and a massive screen for around $1,550. Just know it's not the brightest, so it's best in a darker room.
Pros & Cons
Pros
- Infinite contrast delivers perfect blacks that make movies look stunning in a dark room. 99th
- Four HDMI 2.1 ports with 120Hz support is a gamer's dream setup. 97th
- The 77-inch size at this price is an incredible value for OLED. 97th
- webOS 24 is snappy and the smart features cover every major streaming app. 96th
Cons
- Peak brightness is mediocre, so HDR highlights don't pop as much in bright rooms.
- The a8 processor's upscaling of low-res content is just okay, not class-leading.
- Only a 2.0 channel speaker system, so you'll really want a soundbar.
- Wi-Fi 5 instead of the newer Wi-Fi 6 feels a bit dated for a 2024 TV.
What owners think
The Word on the Street
How owner sentiment changed over time
ExclusiveBased on when customers actually wrote their reviews - so you can see whether early praise held up.
Based on 200 dated customer reviews, grouped by calendar quarter. Period analysis is in English.
The proof
Performance
Gaming is where this TV absolutely sings. A 0.1ms response time and full support for G-Sync and FreeSync put it in the 99th percentile, which is as good as it gets. The four HDMI 2.1 ports mean you can hook up a PC, PS5, and Xbox Series X simultaneously without an HDMI switch. The display scores are top-tier too, thanks to that infinite contrast. The weak spot is peak brightness. The picture quality percentile lands at 36th, dragged down by HDR impact that doesn't hit as hard as QLED or LG's own MLA-equipped OLEDs. It's still beautiful, just not searingly bright.
Specifications
Full Specifications
Display
| Size | 77" |
| Resolution | 4K |
| Panel Type | OLED |
| Backlight | OLED |
| Aspect Ratio | 16:9 |
| Curved | No |
Picture Quality
| Contrast Ratio | Infinite |
| Color Gamut | 100 % Farbvolumen |
| Processor | a8 AI Processor 4K |
HDR
| HDR Formats | Dolby Vision, HDR |
| Dolby Vision | Yes |
| HDR10+ | No |
| HLG | Yes |
Gaming
| Refresh Rate | 120 Hz |
| Response Time | 0.1 |
| VRR | FreeSync, G-Sync |
| ALLM | Yes |
| Game Mode | Yes |
Smart TV
| Platform | webOS |
| Voice Assistant | Amazon Alexa |
| Screen Mirroring | Apple AirPlay 2, Chromecast |
| Works With | Alexa, Google, Apple HomeKit |
Audio
| Speaker Config | 2 |
| Wattage | 160.6 |
| Dolby Atmos | Yes |
| Surround Sound | Dolby Atmos |
| eARC | Yes |
Connectivity
| HDMI Ports | 4 |
| HDMI Version | 2.1 |
| USB Ports | 2 |
| Wi-Fi | Wi-Fi 6E |
| Bluetooth | 5.1 |
| Ethernet | Yes |
| Optical Audio | Yes |
| VESA Mount | 300x200 |
Power & Size
| Power | 161 |
| Energy Star | Yes |
| Annual Energy | 296 |
| Weight | 22.9 kg / 50.5 lbs |
vs Competition
Stacked against the Sony A95L, the LG B4 gets demolished on brightness and processing, but it's also in a completely different price universe. The Samsung QN900F is an 8K monster with eye-searing brightness, but it can't touch the B4's perfect black levels and costs a fortune. The more realistic fight is with the TCL QM7K and Hisense U7. Those Mini-LED TVs get much brighter and are great for sun-drenched rooms, but they lose on viewing angles, blooming control, and that pixel-level precision OLED is famous for. The B4 is for the dark-room cinephile, not the bright-living-room sports fan.
| Spec | LG B4 OLED77B4PUA 77" | Sony BRAVIA 9 K85XR90 | Samsung Neo QLED QN75QN990FFXZA | Hisense U8 Series 100U8QG | TCL QM6K Series 55QM6K | Roku Plus Series 65R6C7 |
|---|---|---|---|---|---|---|
| Screen Size | 77 | 85 | 75 | 99.5 | 55 | 65 |
| Resolution | 3840x2160 | 3840x2160 | 7680x4320 | 3840x2160 | 3840x2160 | 3840x2160 |
| Panel Type | OLED | Mini-LED | QD-Mini-LED | Mini-LED | QLED | Mini-LED |
| Refresh Rate | 120 | 120 | 120 | 165 | 144 | 60 |
| Hdr | Dolby Vision, HDR | HDR 10, Hybrid Log-Gamma (HLG), Dolby Vision | HDR10, HDR10+, HLG | Dolby Vision, HDR 10+, HDR 10, Hybrid Log-Gamma (HLG) | Dolby Vision, HDR10+, HDR10, HLG | Dolby Vision, HDR 10+, Hybrid Log-Gamma (HLG) |
| Smart Platform | webOS | Google TV | Tizen | Google TV | Google TV | Roku TV |
| Dolby Vision | true | true | false | true | true | true |
| Dolby Atmos | true | true | true | true | true | true |
| Hdmi Version | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 |
| Compare | Compare | Compare | Compare | Compare |
| Product | HDR | Audio | Smart | Gaming | Display | Connectivity | Social Proof | Picture Quality |
|---|---|---|---|---|---|---|---|---|
| LG B4 OLED77B4PUA 77" | 63.9 | 96 | 76 | 99.2 | 96.9 | 96.5 | 94.5 | 36.7 |
| Sony BRAVIA 9 K85XR90 Compare | 76.7 | 96.9 | 91.6 | 79.3 | 94.5 | 92.7 | 88.1 | 79.7 |
| Samsung Neo QLED QN75QN990FFXZA Compare | 85.1 | 99.5 | 84.8 | 88.3 | 99.6 | 99.9 | 99.9 | 85.2 |
| Hisense U8 Series 100U8QG Compare | 91.4 | 98.2 | 95.7 | 95 | 94.5 | 86 | 77 | 98.8 |
| TCL QM6K Series 55QM6K Compare | 98.7 | 88 | 97.5 | 93.4 | 77.8 | 89 | 88.1 | 98.7 |
| Roku Plus Series 65R6C7 Compare | 76.7 | 82.2 | 99.8 | 58.8 | 84.9 | 89 | 94.5 | 36.7 |
Price
Value & Pricing
For around $1,550, a 77-inch OLED is a screaming deal. You're getting 95% of the movie-watching magic of LG's more expensive sets for a lot less cash. The price gap between this and a similarly sized C4 can be hundreds of dollars, and for most people, the B4 is the smarter buy. If you've been waiting for a big-screen OLED to drop into a reasonable price range, this is it.
Read more
Overview
The LG B4 is the sweet spot in LG's 2024 OLED lineup. You get that gorgeous self-lit pixel contrast, a 120Hz panel, and four full-bandwidth HDMI 2.1 ports without paying the premium for the brighter C4 or G4 series. For a 77-inch screen, the value here is genuinely hard to beat right now.
It's not the brightest OLED on the block, and the processor is a step down from the flagship models. But if you control the light in your room, or mostly watch at night, the picture is stunning. Deep, inky blacks and vibrant colors make movies and games pop in a way LED TVs just can't match.
Common Questions
Q: Does this TV come with a stand?
Yes, the LG B4 includes a stand. It's a fairly standard center-mounted design that's sturdy, but wide enough that you'll want to measure your media console first.
Q: Does this TV have built-in speakers?
It does, a 2.0 channel system with 20 watts of power. It's fine for casual news and sitcoms, but for movies and games, you'll definitely want to budget for a soundbar to match the picture quality.
Q: What type of audio does this LG TV support?
It supports Dolby Atmos passthrough via eARC, so you can send high-quality surround sound to a compatible soundbar or receiver. The TV itself can also decode standard Dolby Atmos for its built-in speakers.
Who Should Skip This
Skip this if your TV room is flooded with sunlight. The screen's peak brightness and reflection handling just aren't strong enough to fight a lot of glare. You'd be much happier with a bright Mini-LED like the Hisense U7 or TCL QM7K. Also, if you watch tons of 24/7 news channels with static logos, the risk of OLED burn-in, however small, might not be worth the stress.
Verdict
Buy this if you want a massive, immersive screen for movies and gaming in a light-controlled room. It's a phenomenal canvas for 4K Blu-rays and next-gen consoles. If your TV faces a wall of windows, or you watch a lot of cable news with static tickers, a bright Mini-LED might be a safer, less burn-in-anxiety-inducing bet. But for pure cinematic impact per dollar, the 77-inch B4 is a knockout.
