Boxed

A 1976 boxed set collecting Mike Oldfield's first three albums (Tubular Bells, Hergest Ridge, and Ommadawn) plus the new rarities collection Collaborations, containing newly recorded material that Oldfield made with various outside collaborators. All audio is mixed in SQ Quadrophonic sound, which enables compatibility with both two-channel and four-channel sound.
While Tubular Bells previously received a quadrophonic mix shortly after the original 1973 release, Oldfield stated in a 2007 interview with Resolution magazine that it used "this strange fake out-of-phase system," resulting in it not being truly quadrophonic. Consequently, the quadrophonic mix on Boxed is newly done specifically for the compilation; as an added bonus for those who already owned the original, the outro at the end of the album is replaced with an earlier, longer version where master of ceremonies Viv Stanshall gives a drunken tour.
Similarly, the remix of Hergest Ridge featured substantial alterations compared to the original 1974 release; Oldfield disliked the earlier version, considering it substandard as a result of its rushed production. At his request, all subsequent reissues of Hergest Ridge prior to the 2010 remix use the SQ Quadrophonic version from Boxed. Because of this, these standalone reissues can be converted to four-channel sound when played through an SQ Quadrophonic decoder.