You can update the firmware via the Smart Control app or using a USB flash drive.
USB update method
- Download the update file "image.swu" from the Sennheiser website and save it to a 1 GB FAT-formatted USB drive.
- Connect the USB drive to the soundbar and press the SETUP button for 5 seconds.
- The display will show "Updating." The process may take up to 8 minutes.