LG OLED B4 vs LG OLED B9

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OLED B4 compared with OLED B9

	LGOLED B4	LGOLED B9
Overview
Released
Released	March 2024	2019
Display
Panel
Panel	OLED	OLED
Panel detail
Panel detail	Self-lit 4K OLED with pixel dimming	–
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
HDR extras
HDR extras	–	Advanced HDR by Technicolor also supported
Picture processing
Picture processing	AI Picture Pro, α8 AI Super Upscaling 4K, AI Brightness Control, Dynamic Tone Mapping Pro and Filmmaker Mode	AI Picture, AI Brightness, 4K Upscaler and dynamic tone mapping
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 (RTINGS); exact LG France 55-inch sheet confirms 4K HFR at 120fps over HDMI and USB. Original UK and Austrian sheets retain the launch wording that HDMI HFR would be enabled by update.
Sizes
Sizes
Sizes	48, 55, 65, 77″	55, 65, 77″
Largest size
Largest size	77″	77″
Gaming
HDMI ports
HDMI ports	4 (all HDMI 2.1 at 4K 120 Hz+)	4 (all HDMI 2.1 at 4K 120 Hz+)
Variable refresh rate
Variable refresh rate	HDMI VRR, FreeSync Premium, G-Sync Compatible	HDMI VRR, 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 2.1 inputs, one rear and three side; eARC on HDMI 2. RTINGS' original test lacked an HDMI 2.1 source and did not measure 4K 120Hz input.
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	HDMI VRR and ALLM. RTINGS records G-Sync Compatible firmware support in its June 2020 update; this is a later feature, rather than a launch-day capability. No FreeSync support is claimed.
Smart TV and sound
Smart TV platform
Smart TV platform	webOS	webOS
Processor
Processor	α8 AI Processor 4K	α7 Gen2 Intelligent Processor
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	–
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	Dolby Atmos, AI Sound, Clear Voice III and DTS decoding; RTINGS confirms eARC Dolby Atmos and DTS:X passthrough to compatible receivers.
Voice assistants
Voice assistants	Built-in Amazon Alexa and LG intelligent voice recognition; supported languages vary by country	–
Casting
Casting	Apple AirPlay 2, ThinQ remote app and Multi View	Apple AirPlay 2; regional maker sheets include this later feature
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.	First sale retained at year precision because no exact maker on-sale month was established by the bounded source search.
USB
USB	Two USB 2.0 ports	Three USB ports, two rear and one side
Ethernet
Ethernet	Ethernet LAN port	Ethernet LAN port
Optical audio out
Optical audio out	One optical digital audio output	Optical digital audio output; headphone output also fitted
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; 77″ 1723 × 992 × 55.3 mm. Exact PLA regional LG sheets fill missing UK size measurements.
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.	55″ and 65″ stand width 559 mm; 77″ with stand 1723 × 1043 × 270 mm
VESA pattern
VESA pattern	300 × 200 mm across these UK sizes	55″ and 65″: 300 × 200 mm; 77″: 400 × 200 mm
Power use
Power use	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	Magic Remote and power cable; UK 65-inch sheet lists two AA batteries