Bassist
In 1966, at the same time that he was designing the cover of Revolver, Voormann became a member of the 1960s band Manfred Mann, having turned down offers by The Hollies and The Moody Blues. Voormann did substitute for Eric Haydock on a couple of TV shows (see List of The Hollies band members). He mentions his negotiations with the group in his biography: Warum spielst Du Imagine nicht auf dem weißen Klavier, John? Voormann played bass and flutes for Manfred Mann from 1966 to 1969, appearing on all their UK hits from "Just Like a Woman" (July 1966) to their final single "Ragamuffin Man" (April 1969) and including the 1968 international hit "The Mighty Quinn" (#1 UK, #10 US).
After that, he became a session musician, playing on solo projects by Lou Reed, Carly Simon, James Taylor, and Harry Nilsson amongst others. Voormann was a member of Yoko Ono and Lennon's Plastic Ono Band, with Ono, Alan White (future Yes drummer) and Eric Clapton, which played at the Live Peace in Toronto 1969 album, recorded prior to the break-up of the Beatles in Toronto on 13 September 1969.
In 1971 he moved to Los Angeles. In an interview with EMI about his album Walls and Bridges, Lennon was asked who was playing bass on the album. Lennon answered with a hard German accent: "Klaus Voormann. We all know Klaus, ja (German: "yes")". He also played in Harrison's assembled band at the 1971 The Concert for Bangladesh; Harrison fittingly introduced him to the audience by saying, "There's somebody on bass who many people have heard about, but they've never actually seen him – Klaus Voormann." After Harrison died, Voorman played bass as part of the supporting band on the song "All Things Must Pass", in the Concert for George on 29 November 2002.
After the Beatles disbanded, there were rumours of them reforming as the Ladders, with Voormann on bass as a replacement for Paul McCartney. An announcement to this effect filtered out of the Apple offices in 1971, but was ultimately withdrawn before it got very far. This line-up (Voormann, Lennon, Harrison and Starr) did perform in various combinations on Lennon's albums, John Lennon/Plastic Ono Band (1970) (Voormann, Lennon, and Starr) and Imagine (1971) (Voormann, Lennon & Harrison) as well as on Ringo Starr's eponymous album Ringo, in 1973, and Yoko Ono's Yoko Ono/Plastic Ono Band (1970) (Voormann, Lennon, Starr, and Ono). Starr's album features the Lennon-penned "I'm The Greatest", which is the only song on which all four musicians appear together, joined by Billy Preston. He also played on Lennon's "Instant Karma!" single.
In 1979 Voormann moved back to Germany. He produced three studio albums and a live album by the German band Trio. He also produced their worldwide hit "Da Da Da". After Trio broke up in 1986, he produced the first solo album by their singer Stephan Remmler and played bass on some songs of the album. The following year he produced a single by former Trio drummer Peter Behrens.
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