Deep Purple in Rock (also known as In Rock) is an album by English rock band Deep Purple, released in June 1970. It was their fourth studio album, and the first with the classic Mk II lineup. Deep Purple in Rock was their breakthrough album in Europe and would peak at #4 in the UK, remaining in the charts for months.
Fireball is a hard rock album by English rock band Deep Purple, released in 1971. It was their fifth studio album, and the second with the classic Mk II lineup. It was recorded at various times between September 1970 and June 1971. It would become the first of the band's three UK #1 albums.
Machine Head is the sixth Deep Purple studio album. It was recorded at the Grand Hotel Montreux, Switzerland in December 1971 with the Rolling Stones Mobile Studio, and released in March 1972.
The album is often cited as being very influential in the development of the heavy metal music genre. It is Deep Purple's most successful recording, topping the charts in several countries following its release. In 2001 Q magazine named it as one of the 50 Heaviest Albums of All Time.
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