How should I set up the ART/UPGRADE switch? 31 March 2023 14:12 Updated See Chapter 4, point 12. ART of the manual of an AF amplifier bit. Related articles 4. CONNECTION PANELS - DESCRIPTION How can I connect a bit AF amplifier to a generic companion amplifier? How can I connect a bit AF amplifier to an AF D amplifier? Is the DRCC port compatible with DRC MP or DRC AB? 6. ACCORDO - AUTOMATIC TUNE OUTPUT EQ, DELAYS AND LEVELS