Sunn O))) (pronounced "sun") is an American experimental metal band formed in 1998 in Seattle, Washington. The band is known for their distinctive visual style and slow, heavy sound, which blends diverse genres including doom metal, drone, black metal, dark ambient, and noise rock, as well as for their loud live performances.

The band's core members are Stephen O'Malley (also of Khanate and Burning Witch) and Greg Anderson (of Goatsnake and Engine Kid).

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