LG OLED B4 vs LG OLED BX

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OLED B4 compared with OLED BX

	LGOLED B4	LGOLED BX
Overview
Released
Released	March 2024	2020
Display
Panel
Panel	OLED	OLED
Panel detail
Panel detail	Self-lit 4K OLED with pixel dimming	Self-lit OLED with pixel dimming and Ultra Luminance Pro
Resolution
Resolution	3840 × 2160 (4K)	3840 × 2160 (4K)
Refresh rate
Refresh rate	120 Hz	120 Hz
HDR formats
HDR formats	Dolby Vision, HDR10, HLG	Dolby Vision, HDR10, HLG
Picture processing
Picture processing	AI Picture Pro, α8 AI Super Upscaling 4K, AI Brightness Control, Dynamic Tone Mapping Pro and Filmmaker Mode	AI Picture, face enhancement, AI Brightness, dynamic tone mapping, 4K upscaling and Filmmaker Mode
Picture modes
Picture modes	Personalised Picture Wizard, Vivid, Standard, APS, Cinema, Sports, Game, Filmmaker and ISF Expert bright/dark room modes	–
Motion handling
Motion handling	Native 120Hz panel; OLED Motion and HDMI 4K 120 fps input	Native 120Hz OLED panel; OLED Motion Pro and 4K high-frame-rate playback. LG's 2020 rollout release states 120Hz for its OLED TVs, corroborated by the exact BX reviews.
Sizes
Sizes
Sizes	48, 55, 65, 77″	55, 65″
Largest size
Largest size	77″ (better)	65″
Gaming
HDMI ports
HDMI ports	4 (all HDMI 2.1 at 4K 120 Hz+) (better)	4 (2 HDMI 2.1 at 4K 120 Hz+)
Variable refresh rate
Variable refresh rate	HDMI VRR, FreeSync Premium, G-Sync Compatible	HDMI VRR, FreeSync, G-Sync Compatible
Auto low latency mode
Auto low latency mode	Yes	Yes
HDMI detail
HDMI detail	Four inputs support 4K 120Hz, VRR, ALLM and QMS; eARC on HDMI 3	Four HDMI inputs, two HDMI 2.1 and two HDMI 2.0; two rear and two side connectors. LG specifies eARC on rear HDMI 3. HIFI.DE identifies the two rear inputs as HDMI 2.1; TechRadar's claim of four HDMI 2.1 inputs conflicts with LG's specification.
Variable refresh range
Variable refresh range	LG specifies 40–120Hz	–
Game features
Game features	Game Optimiser and Dashboard, HGiG, AMD FreeSync Premium, NVIDIA G-SYNC Compatible and Dolby Vision gaming at 4K 120Hz	HGiG, NVIDIA G-SYNC Compatible, FreeSync and Instant Game Response with VRR and ALLM
Smart TV and sound
Smart TV platform
Smart TV platform	webOS	webOS
Processor
Processor	α8 AI Processor 4K	α7 Gen3 Processor 4K
Speakers
Speakers	20 W, 2.0 channels	40 W, 2.2 channels (better)
Dolby Atmos
Dolby Atmos	Yes	Yes
eARC
eARC	Yes	Yes
Wi-Fi
Wi-Fi	Wi-Fi 5	Wi-Fi 5 (802.11ac)
Bluetooth
Bluetooth	5.1	5.0
Speaker detail
Speaker detail	Down-firing 2.0-channel speakers	Down-firing 2.2-channel speakers; 20 W woofer output and 10 W per channel within the 40 W total
Audio features
Audio features	α8 AI Sound Pro with virtual 9.1.2 up-mixing, acoustic tuning, Clear Voice Pro, Bluetooth Surround Ready and WiSA up to 2.1 channels	AI Sound, acoustic tuning, Clear Voice III, Bluetooth Surround Ready and WiSA speaker support
Voice assistants
Voice assistants	Built-in Amazon Alexa and LG intelligent voice recognition; supported languages vary by country	LG voice search, Google Assistant and Amazon Alexa
Casting
Casting	Apple AirPlay 2, ThinQ remote app and Multi View	AirPlay support reported by HIFI.DE
Software updates
Software updates	webOS 24; LG states four upgrades over five years with regional scheduling differences and security support through 31 December 2028. LG Australia's March 2024 launch notice confirms the range available now and lists 55/65-inch B4 March availability; release records that first confirmed series month, not a universal UK size-specific date.	webOS 5.0. LG's March 2020 US release scheduled BX availability for May, but that future schedule does not confirm actual first sale; the first on-sale month remains unconfirmed. TechRadar describes missing UK Freeview Play at launch.
TV tuners
TV tuners	–	UK DVB-T/T2, DVB-C and DVB-S/S2; CI+ 1.4, eight-day programme guide and USB recording/time shift. The German review's twin-tuner specification is not applied to these UK models.
USB
USB	Two USB 2.0 ports	Three USB ports, one rear and two side
Ethernet
Ethernet	Ethernet LAN port	Ethernet LAN port
Optical audio out
Optical audio out	One optical digital audio output	Optical digital audio output and shared headphone/line output
Design and power
Size
Size	Without stand (W × H × D): 48″ 1070 × 620 × 45.9 mm; 55″ 1228 × 708 × 45.9 mm; 65″ 1449 × 832 × 45.9 mm; 77″ 1719 × 989 × 50.9 mm	Without stand (W × H × D): 55″ 1228 × 706 × 46.9 mm; 65″ 1449 × 830 × 46.9 mm
Stand
Stand	With stand (W × H × D; weight): 48″ 1070 × 684 × 235 mm, 11.7 kg; 55″ 1228 × 772 × 235 mm, 14.5 kg; 65″ 1449 × 896 × 235 mm, 17.3 kg; 77″ 1719 × 1057 × 319 mm, 23.5 kg. Stand footprint: 48″ 933 × 235 mm; 55/65″ 1057 × 235 mm; 77″ 1403 × 319 mm.	With stand (W × H × D; weight): 55″ 1228 × 744 × 246 mm, 19.9 kg; 65″ 1449 × 869 × 246 mm, 25 kg. Stand width 559 mm for both sizes.
VESA pattern
VESA pattern	300 × 200 mm across these UK sizes	300 × 200 mm for both sizes
Power use
Power use	Under 0.5 W standby; 100–240 V AC, 50–60Hz supply	Under 0.5 W standby; 100–240 V AC, 50–60Hz supply
In the box
In the box	Magic Remote MR24, two AA batteries and attached power cable	MR20 Magic Remote, two AA batteries and attached power cable