Seven CD set. Digitally remastered box set featuring all of the albums and singles recorded by the legendary American acid/progressive rock band Iron Butterfly recorded for Atlantic's Atco label between 1967 and 1971 and additional recordings made at the Fillmore East in New York City in April 1968. In October 1967, the band recorded their debut album, Heavy, which was released in January 1968. The album In-A-Gadda-Da-Vida, issued in June 1968, would break the band into star status. It reached a height of #4 in the US charts and went on to sell a million copies. An edited version of the title track was issued as a single and reached the US top thirty. The band's third album, Ball, was released in January 1969 and was even more successful, reaching #3 in the US. The band undertook a punishing touring schedule and a series on concerts were recorded in May 1969, finally to be issued as Live in April 1970. They released Metamorphosis in May 1970 which saw the band take a heavier direction. After releasing a final single, Silly Sally in April 1971. Iron Butterfly disbanded. Although they would reform in the mid-1970s and continue to perform and record sporadically afterwards, their recorded work for Atco Records remains their main legacy. Unconcious Power - An Anthology 1967 - 1971 features all of the albums issued on Atco, all newly re-mastered from the original master tapes, and additionally includes the rare mono mixes of the albums Heavy and Live, (the only true separate mono mixes of their albums), both previously unreleased on CD, along with two CDs of recordings made at the Fillmore East in New York City on the 26th and 27th April 1968. It also includes all of the band's US non-album singles and single edits and a lavishly illustrated booklet with a new essay featuring interviews with Ron Bushy and Mike Pinera and a poster.