For sale is a Adcom GFS-565 power amp. Solid-state monoblock power amplifier. Rated power output: 300W into 8 ohms (24.8dBW), 450W into 4 ohms (23.5dBW), 850W into 2 ohms (23.3dBW. The unit comes with a two week warranty guarantee. We don’t have the proper pre amp to test it currently.