Sunn O))) is an American drone metal band formed in 2000 in Seattle, Washington. Known for their heavy, atmospheric sound, they often use extended guitar techniques and minimalistic compositions. The band's music typically features low frequencies and long, sustained notes, creating a meditative and immersive experience. The group consists of members Stephen O'Malley and Greg Anderson, who are also involved in various other musical projects. Sunn O))) is recognized for their unique live performances, which often include elaborate visual elements and collaborations with other artists, enhancing the overall sensory experience of their music.