The Adcom GFA-555 is a stereo power amplifier manufactured by Adcom, a company known for producing high-quality audio equipment. It was first introduced in the late 1980s and is still highly regarded among audiophiles today. The GFA-555 features a solid-state design with a power output of 200 watts per channel into 8 ohms. It uses a unique patented balanced bridged configuration to deliver exceptional sound quality with low distortion and high power capability. The amplifier has gained a reputation for its strong build quality, reliability, and transparent sound reproduction.