LG B4 55" vs LG UR8000 55" (UHD)
The Verdict
LG's B4 OLED and UR8000 IPS LCD represent entirely different market segments at dramatically different price points. The B4 delivers premium picture quality with its OLED panel producing perfect blacks, infinite contrast, and 1100 nits of peak brightness for exceptional Dolby Vision IQ performance. Its 120Hz refresh rate, 1ms input lag, and gaming-focused features like VRR and ALLM make it ideal for console and PC gamers. The UR8000, priced at just $399, offers solid everyday viewing with 4K resolution and basic HDR support, but its IPS LCD panel caps brightness at 300 nits and lacks gaming optimization entirely with 15ms input lag. Audio differs too: B4's 40-watt system with Dolby Atmos versus UR8000's modest 20-watt output. Both run webOS with voice assistants, but B4's newer α8 Gen 7 processor handles more demanding tasks. Weight and design favor the UR8000 at 27.1 lbs, though B4's sturdy 41.9-lb build reflects its premium construction. If you prioritize cinematic picture quality, gaming performance, and long-term value from an OLED investment, the B4 justifies its $1199 price. Budget-conscious buyers seeking basic 4K streaming should consider the UR8000, though it can't match the B4's visual excellence. These aren't really competitors—they serve different needs entirely.
Who Should Buy
Buy the LG B4 55" if…
- →Lowest-cost entry into LG's OLED lineup with the same perfect blacks
- →All four HDMI ports with VRR and ALLM at 4K@120Hz for gaming
- →Dolby Vision and Dolby Atmos at an entry OLED price
Buy the LG UR8000 55" (UHD) if…
- →Affordable 55-inch 4K at $399 for budget-conscious buyers
- →webOS 23 smart TV platform with all major streaming apps
- →IPS panel offers wide viewing angles for family rooms
Category Scores
Pros & Cons
LG B4 55"
Pros
- Lowest-cost entry into LG's OLED lineup with the same perfect blacks
- All four HDMI ports with VRR and ALLM at 4K@120Hz for gaming
- Dolby Vision and Dolby Atmos at an entry OLED price
- webOS 24 is one of the best smart TV interfaces available
Cons
- Only two HDMI 2.1 ports — the other two are HDMI 2.0 (limited to 4K@60Hz)
- α8 processor is noticeably weaker than the C4's α9 for upscaling and processing
- Lower peak brightness than the C4 or G4 — HDR highlights lack some punch
- No Wi-Fi 6, which limits wireless bandwidth in crowded network environments
- OLED burn-in risk remains a concern for heavy static-content users
LG UR8000 55" (UHD)
Pros
- Affordable 55-inch 4K at $399 for budget-conscious buyers
- webOS 23 smart TV platform with all major streaming apps
- IPS panel offers wide viewing angles for family rooms
- LG ThinQ AI and Alexa voice control built in
- Lightweight at 27.1 lbs — straightforward wall mount installation
Cons
- IPS LCD has poor contrast — blacks appear grey in dark rooms
- 300 nits brightness is very dim — HDR is essentially non-functional
- 60Hz with no VRR — not suitable for gaming
- 20W audio is tinny — external speakers needed
- No Dolby Vision, Dolby Atmos, or HDMI 2.1
Full Specifications
| Spec | LG B4 55" | LG UR8000 55" (UHD) |
|---|---|---|
| Body | ||
| VESA mount | 200 x 200mm | 300 x 300mm |
| Weight | 41.9 lbs | 27.1 lbs |
| Dimensions (w/ stand) | 48.4 x 32.1 x 10.5 inches | 48.7 x 30.4 x 8.4 inches |
| Dimensions | — | 48.7 x 28.3 x 3.4 inches |
| Audio | ||
| Output (watts) | 40 | 20 |
| Speakers | 2.0ch | 2.0ch |
| Dolby Atmos | ||
| Gaming | ||
| VRR (Variable Refresh Rate) | ||
| ALLM | ||
| Input lag (ms) | 1 | 15 |
| Display | ||
| HDR | Dolby Vision IQ, HDR10, HLG, Filmmaker Mode | HDR10, HLG |
| Size | 55" | 55" |
| Type | OLED | IPS LCD |
| Resolution | 3840 x 2160 (4K UHD) | 3840 x 2160 (4K) |
| Refresh rate | 120Hz | 60Hz |
| Brightness (nits) | 1100 | 300 |
| Smart TV | ||
| Os | webOS 24 | webOS 23 |
| Voice assistant | ThinQ AI, Alexa, Google Assistant | LG ThinQ AI, Alexa |
| Processor | ||
| Chipset | α8 Gen 7 AI Processor 4K | — |
| Connectivity | ||
| Wi-Fi | Wi-Fi 5 (802.11ac) | Wi-Fi 5 |
| Ethernet | ||
| Bluetooth | 5.0 | 5.0 |
| USB ports | 3 | 1 |
| HDMI ports | 4 | 3 |
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This comparison is based on verified manufacturer specifications covering display, performance, camera, battery, and build quality. Scores are generated by analyzing specs across weighted categories on a 10-point scale. Learn more about our methodology.
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