Originally released by Virgin Records in February 1974, Phaedra is one of Tangerine Dream's most successful and acclaimed albums, spending 15 weeks on the UK charts upon its release. Recorded at The Manor studios in November 1973, it was the band's first album for Virgin and also the record first to feature their classic sequencer-driven music.

This six-disc 50th anniversary boxed set of Phaedra features the remastered original album mix, along with two discs of out-takes from the recording sessions, the complete concert at the Victoria Palace Theatre in London in June 1974 (the band's debut live appearance in the UK) and a Blu-ray disc featuring Steven Wilson's 5.1 Surround Sound mix of Phaedra. The box also features an illustrated book with a new essay by Tangerine Dream authority Wouter Bessels.