During his illustrious career, Johns -- whose brother and nephew, respectively, are fellow producers Glyn Johns and Ethan Johns -- worked on such classic albums as Led Zeppelin's "II," the Rolling Stones' "Sticky Fingers" and Joni Mitchell's "Shadows and Light," Variety.com reports.
According to CNN, Johns was hospitalized late last month. The cause of his death is still unknown.
Born in Surrey, England, Johns began his decades-long career as a tape operator at the famed Olympic Studios in London, where he worked on sessions for the Jimi Hendrix Experience's "Axis: Bold as Love."
"In those days you could go into one studio and Joe Cocker was working, and then you're working with Jimi Hendrix in Studio One, or down the corridor Eric Clapton is doing something," Johns once said of his early Olympic Studios days,