LG 420W High Res Audio Sound Bar with Dolby Atmos AUD GX – Immersive High-Res Audio Experience

The LG GX 3.1 ch High Res Audio Sound Bar with Dolby Atmos (AUD GX) redefines home entertainment with its ultra-slim 1.2-inch thickness, designed to match LG OLED Gallery TVs for a seamless wall-mounted setup. Delivering 300W of power through a 3.1-channel configuration, it includes up-firing drivers for height effects, creating a dome-like sound field that envelops listeners. Dolby Atmos and DTS:X technologies track audio objects in scenes, simulating overhead and surround dimensions for movies, making explosions feel visceral and whispers intimate. High Resolution Audio supports 24bit/96kHz sampling, reproducing studio-master quality with greater detail and realism, ideal for music lovers seeking lifelike playback.

Meridian Audio Engineering

Tuned by Meridian Audio Technologies, the GX ensures precise sound reproduction with balanced highs, mids, and lows, elevating dialogue clarity and instrument separation. This collaboration brings audiophile-grade tuning to a compact bar, supporting uncompressed formats via HDMI eARC for lossless transmission from compatible sources. The soundbar’s metal grille front and mold construction provide a premium feel, while the slim profile (1440 x 30 x 45 mm, 3.3 kg) mounts flush under Gallery TVs, maintaining a minimalist aesthetic without compromising performance.

Advanced Connectivity and Passthrough

HDMI eARC enables high-bitrate audio return from TVs, supporting uncompressed Dolby Atmos and DTS:X without quality loss, alongside 4K and Dolby Vision video passthrough for seamless integration with 4K HDR content. Bluetooth connectivity allows wireless streaming from devices, while optical and USB inputs handle legacy setups or direct MP3/WMA playback. AI Sound Pro analyzes content in real-time, optimizing for genres—enhancing vocals for news or boosting effects for action—ensuring adaptive, immersive listening. WOW Orchestra compatibility with LG TVs expands the soundstage using TV speakers as additional channels.

Quiet and Versatile Operation

Operating at low noise levels, the GX’s inverter-inspired efficiency minimizes fan hum, suitable for bedrooms or quiet evenings. Sound modes like Cinema (Dolby Surround) and Music (Meridian-tuned) cater to preferences, with night mode reducing bass for late viewing. The wireless subwoofer option adds depth, though the bar alone provides balanced bass via passive radiators. Wall-mountable with included brackets, it fits 49-inch+ TVs, saving space while delivering room-filling audio.

Performance in Modern Setups

In dynamic environments, the GX excels with eARC passthrough for 4K sources and Meridian tuning for wide soundstages. Users praise its Atmos height effects and AI clarity, though standalone use may benefit from calibration. Compared to competitors, its Gallery TV matching and slim design offer unique integration.

Why Choose LG GX?

The LG GX delivers breathtaking high-res audio in a gallery-matched package, blending 300W power, Dolby Atmos, and Meridian tech for theater-like immersion. Its eARC connectivity, AI Pro, and 4K passthrough make it ideal for LG TV owners, ensuring quality sound for every occasion.