What is the RESCUE location of the switch for? 31 March 2023 10:14 Updated See Chapter 4, point 12. ART of the manual of an AF amplifier bit. Related articles 4. CONNECTION PANELS - DESCRIPTION What is the UPGRADE location of the switch for? 6. RESCUE PROCEDURE How should I set up the ART/UPGRADE switch? 3. CONFIGURATION WIZARD - INPUT AND OUTPUT SETUP