John Frusciante’s MXR Phase 100
Among others, this pedal was used at the ending of the song ‘Parallel Universe’ from the 1999 album, Californication. If you’re listening to the studio version of the song, you start hearing this effect at around 3:20.
I borrowed an MXR Phase 100 from the people who were recording next door. I was looking for a way to approach that solo, and the Phase 100 worked out well. [Guitar Player (UK), September 1999]
However, during the Californication tour, John was seen using an MXR Phase 90 instead, meaning that he opted to buy this pedal for himself since Phase 100 was only borrowed for the sessions.