Harman Kardon Avr 151 Software Update ((link))

: Use a standard USB thumb drive. Download the firmware ZIP file from the official support site and extract all files.

: This update was notably released to add support for the Harman Kardon Remote app and, in some regions, included stability improvements for network features like Spotify Connect [8, 10]. harman kardon avr 151 software update

Before starting, ensure you have the correct firmware for your specific region. Using software intended for a different region (e.g., using US firmware on a European model) can the unit and void your warranty. : Use a standard USB thumb drive