Sunn O))) is an American drone metal/experimental band based in New York, NY and Los Angeles, CA and formed in 1998. The band’s core members consist of Stephen O’Malley (Khanate, Burning Witch, SARIN, Teeth of Lions Rule the Divine, Lotus Eaters, Ginnungagap, Thorr’s Hammer, Fungal Hex, KTL, Æthenor, Gravetemple) and Greg Anderson (Goatsnake, Thorr’s Hammer, Burning Witch, Teeth of Lions Rule the Divine, Brotherhood, Engine Kid, False Liberty, Burial Chamber Trio, Ascend). The band was formed as a tribute of sorts to Earth, another very heavy band noted as the pioneers of drone metal. G. Stuart Dahlquist currently of Asva and ex-Burning Witch performed bass on The Grimmrobe Demos and ØØ Void.
The band is named after the Sunn amplifier brand, whose logo includes a circle next to the “SUNN” banner with waves heading off to the right - reading those out as letters makes “Sunn O)))”. The band uses the same logo for their albums as well.
Their sound is extremely slow and heavy, using droning guitars accompanied by feedback and other sound effects to create their soundscapes. There is very little drumming and a lack of any discernible beat, though their collaboration album with Boris features drumming from Boris drummer, Atsuo.