Eric Gorfain founded the quartet after working for the 1996 tour of Robert Plant and Jimmy Page.
He said the quartet fulfilled his desire to play lead guitar in a rock band.
The debut album, No Electricity Required (2004), contained Gorfain's arrangement of "Dazed and Confused" by Led Zeppelin in addition to cover versions of songs by Coldplay, Kiss, Iron Maiden, and Queens of the Stone Age.
They have performed on soundtracks and pop music albums, such as Stripped (RCA, 2002) by Christina Aguilera.
Their performance on "Beautiful" impressed the songwriter, Linda Perry.