Lg Soundbar Nb4540 Software Update Jun 2026

If you prefer a manual method or do not have access to the app, you can use a USB flash drive. LG NB4540 Product Support :Manuals, Warranty & More

Usually, no. The subwoofer (Model S54A1-D) syncs automatically. If the subwoofer isn't connecting, try this instead of a firmware update: lg soundbar nb4540 software update

The NB4540 does not support OTA (Over-the-Air) updates via Wi-Fi. It has no built-in internet. You must use USB or the LG Audio Channel app (iOS/Android) over Bluetooth—which is slower and riskier. If you prefer a manual method or do