LG B4 55" vs LG OLED A2 55"
The Verdict
Both 55-inch LG OLED displays deliver stunning picture quality, but they target different audiences. Picture quality heavily favors the B4, which boasts 1100 nits brightness versus the A2's 500 nits,a critical advantage for well-lit rooms and HDR content. Gaming enthusiasts will appreciate the B4's 1ms input lag, 120Hz refresh rate, and VRR support, compared to the A2's 14ms lag and 60Hz limitation. Smart features similarly favor the B4 with webOS 24, superior AI processing, and more connectivity options. However, the A2 remains competent for casual viewing and streaming, supporting all essential HDR formats plus Dolby Atmos. At $300 cheaper, the A2 offers exceptional value for dark-room viewing and content consumption. For competitive gaming or bright environments, the B4's superior specs justify the premium. Recommend the B4 for serious enthusiasts; choose the A2 for budget-conscious buyers prioritizing value.
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 OLED A2 55" if…
- →Budget OLED — perfect blacks and infinite contrast at $899
- →Dolby Vision and Dolby Atmos for immersive movie watching
- →Wide viewing angles inherent to OLED technology
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 OLED A2 55"
Pros
- Budget OLED — perfect blacks and infinite contrast at $899
- Dolby Vision and Dolby Atmos for immersive movie watching
- Wide viewing angles inherent to OLED technology
- Thin and lightweight for easy wall mounting
- Self-lit pixels produce gorgeous picture quality for the price
Cons
- 60Hz panel — no 120Hz, VRR, or HDMI 2.1 for gaming
- Only 500 nits peak brightness — dim in well-lit rooms
- 20W speakers require a soundbar for decent audio
- Only 3 HDMI ports, all HDMI 2.0
- Older α7 Gen5 processor with basic upscaling
Full Specifications
| Spec | LG B4 55" | LG OLED A2 55" |
|---|---|---|
| Body | ||
| VESA mount | 200 x 200mm | 300 x 200mm |
| Weight | 41.9 lbs | 29.1 lbs |
| Dimensions (w/ stand) | 48.4 x 32.1 x 10.5 inches | 48.4 x 30.0 x 9.4 inches |
| Dimensions | — | 48.4 x 28.0 x 1.8 inches |
| Audio | ||
| Output (watts) | 40 | 20 |
| Speakers | 2.0ch | 2.0ch |
| Dolby Atmos | ||
| Gaming | ||
| VRR (Variable Refresh Rate) | ||
| ALLM | ||
| Input lag (ms) | 1 | 14 |
| Display | ||
| HDR | Dolby Vision IQ, HDR10, HLG, Filmmaker Mode | Dolby Vision, HDR10, HLG |
| Size | 55" | 55" |
| Type | OLED | OLED (WOLED) |
| Resolution | 3840 x 2160 (4K UHD) | 3840 x 2160 (4K) |
| Refresh rate | 120Hz | 60Hz |
| Brightness (nits) | 1100 | 500 |
| Smart TV | ||
| Os | webOS 24 | webOS 22 |
| Voice assistant | ThinQ AI, Alexa, Google Assistant | LG ThinQ AI, Alexa, Google Assistant |
| 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 | 2 |
| 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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