Effective period / Period of releases: 2004 - 2015

Members: Allan Holdsworth, Ryo Okumoto, Yvette Devereaux, Doug Sanborn, Shaun Guerin, John Miner, Ken Jaquess, Karl Johnson (3)

K² is an American progressive rock band founded in 2001 in Los Angeles, California and composed of bassist/keyboardist Ken Jaquess (Atlantis (37), New Cross), keyboardist Ryo Okumoto (Spock's Beard, Natalie Cole), drummer Doug Sanborn (the Untouchables), electric violinist Yvette Devereaux, singer Shaun Guerin, guitarist Allan Holdsworth (Tempest, Soft Machine, Gong and UK (3)) and guitarist John Miner (Art Rock Circus).