Listen to System of a Down online radio. System of a Down, also known by the acronym SOAD and often shortened to System, is an American rock band from Southern California, formed in 1994 and currently consists of four Armenian-Americans Daron Malakian (vocals, guitar),Serj Tankian (lead vocals, occasional keyboards and rhythm guitar), Shavo Odadjian (bass, background vocals) and John Dolmayan (drums).