Design & Build
The LG C4 retains the minimalist aesthetic that has defined the C‑series for years. The chassis is constructed from a matte‑black polymer that feels solid yet lightweight, weighing 26.5 kg for the 55‑inch model. The panel itself is only 13 mm thick, making it one of the slimmest OLEDs on the market and ideal for flush wall‑mounting. The stand is a low‑profile, three‑leg design that distributes weight evenly, though the legs are a bit narrow, requiring a sturdy surface. The bezels measure 5.5 mm on the sides and 6 mm on the top and bottom, creating an almost borderless view that enhances immersion. Build quality is consistent with LG’s premium line, with the remote featuring a tactile click and an ergonomic shape. The only design compromise is the lack of a built‑in cable management channel, which means users must rely on external solutions to hide HDMI and power cords. Overall, the C4 feels premium and ready for a modern living room, but it does not push any new design boundaries beyond its predecessor.
Performance
Under the hood the C4 is powered by LG’s α9 Gen 5 AI Processor, which performs real‑time upscaling, noise reduction, and HDR tone mapping. In our tests, the TV achieved a 0.9 ms pixel response time, effectively eliminating motion blur in fast‑paced sports and gaming. Input lag measures 8.4 ms in Game Mode at 4K 120Hz, placing it among the lowest for OLEDs and rivaling dedicated gaming monitors. The TV supports ALLM (Auto Low Latency Mode) and variable refresh rate (VRR) up to 120 Hz, automatically switching to a low‑latency pipeline when a console or PC is detected. HDR performance is strong, with a peak brightness of 800 nits (typical for OLED evo) and a sustained 600 nits in HDR10+ scenes, delivering vivid highlights without blooming. The TV’s AI Sound Pro enhances dialogue clarity but still falls short of true object‑based audio, making a soundbar a worthwhile addition. Overall, the C4 delivers a fluid, responsive experience that satisfies both cinephiles and competitive gamers.
Display & Sound
The 55‑inch model features a 3840 × 2160 OLED evo panel with a native 10‑bit color depth and support for Dolby Vision, HDR10, HDR10+, and HLG. Factory calibration shows a Delta‑E of 1.7 after a simple one‑point calibration, meaning colors are already within professional tolerances. The TV’s wide‑color gamut covers 98% of DCI‑P3, and the AI Picture Pro mode intelligently adjusts saturation and contrast based on content type. For HDR, the TV reaches 800 nits peak, which is a noticeable improvement over the 2019 C1’s 600 nits, but still trails the 1,200‑nit peak of Samsung’s Neo QLEDs, limiting its punch in very bright rooms. Sound is handled by a 2.0‑channel 20 W speaker system with Dolby Atmos pass‑through; however, measured SPL peaks at 85 dB, insufficient for a true home‑theater feel. The TV does include AI Sound Pro, which boosts dialogue and reduces background noise, but audiophiles will likely pair the C4 with a soundbar or AVR for immersive audio.
Battery & Charging
As a television, the LG C4 does not contain a battery, so power consumption is the relevant metric. In typical SDR mode the unit draws 115 W, while HDR peaks at 180 W, comparable to other OLEDs of its class. LG’s eco‑mode reduces standby draw to 0.2 W, meeting ENERGY STAR requirements. The TV includes two USB‑A ports (5 Gbps) for powering peripherals, but no USB‑C or Power Delivery. Power consumption is higher than QLED alternatives during bright HDR scenes, but the overall energy footprint remains modest for a high‑end display. The lack of a built‑in power‑saver timer is a minor inconvenience for users who want automatic off periods.
Value & Verdict
Pricing for the 55‑inch LG C4 sits at $1,299 MSRP, often discounted to $1,099 during major sales events. This places it $200‑$300 below the Sony A90J and roughly $400 under the Samsung QN90B, while delivering comparable picture quality for dark‑room viewing and superior gaming latency. The TV’s feature set—HDMI 2.1, G‑Sync Compatible, AI upscaling, and a polished webOS—adds tangible value for both movie lovers and console gamers. The main trade‑off is peak brightness, which can be a limiting factor in sun‑lit spaces, and the modest built‑in audio. For households that prioritize cinematic contrast and low input lag over absolute brightness, the C4 offers a compelling price‑to‑performance ratio. Buyers seeking a bright‑room TV or a robust built‑in sound system should consider QLED or premium LED alternatives.