This FAQ refers to classic Adcom products from the 80s and 90s, such as the GFA-565, GFA-535, GFA-545, and GFA-555, in MKI and MKII variations. It does not cover MOSFET amps like the GFA-5500, GFA-5800 or GFA-5802. Also, I have no experience with, or opinion on, currently produced Adcom products, or any official affiliation with … Continue reading ADCOM FAQ