Sunn O))) (pronounced simply sun ) is an American drone metal band from Seattle, Washington that formed in 1998. The band is primarily known for its synthesis of diverse genres including drone, ambient, noise, extreme metal and for its extremely loud live performances. Supported by a varying cast of collaborators, the band was formed by two core members: Stephen O'Malley (also of Khanate and Burning Witch) and Greg Anderson (of Goatsnake and Engine Kid).