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 What are the ways to turn on the amplifier? For which inputs is the ART (Automatic Remote Turn) function active? DRC AC If I purchased a counterfeit product, whom can I contact to get a refund?