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 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? How can I tell if the product that I purchased / that I would like to purchase is fake? Is the DRCC port compatible with DRC MP or DRC AB? How much power do you need?