Lg Soundbar Nb4540 Software Update [top] May 2026

The is a 4.1-channel, 360W sound bar known for its wireless subwoofer and rear speakers, delivering a robust home theater experience. However, like any smart audio device, its performance—specifically regarding HDMI ARC handshakes, optical input lag, wireless connectivity, and DSP (Digital Signal Processing) presets—can degrade or glitch without current firmware.

on your smartphone. Since this model is a legacy device (released around 2014), official firmware downloads for manual USB installation are often not listed on LG's support pages. Method 1: Update via the LG Soundbar App lg soundbar nb4540 software update

Do not download firmware for other LG soundbars (NB4530, NB4540A, etc.). Using incorrect files can brick your device. The is a 4