Before Fiumani took the lead in 1989, the singer was Nicola Vannini, followed by Miro Sassolini, who recorded the first three Diaframma albums: Siberia, 3 Volte Lacrime and Boxe.

Through changes in the line-up of Diaframma over the years, several well-known Italian rock musicians recorded and toured with the band: Daniele Trambusti (drums, already working with Litfiba, Avida, Bella Band and many other Italian rock acts of the 80s and 90s), Alessandro Gerbi (drums, already working with CCCP Fedeli alla linea), Gianni Cerone (drums), Alessio Riccio (drums), Simone Giuliani, now a record producer and film composer living in New York City (keyboards and vocals), Alessandro Gherardi (keyboards), Guido Melis (bass), Riccardo "Foggy" Biliotti (bass).

Diaframma reached the status of cult band because of charismatic leader Federico Fiumani's statements and fierce lyrics.

Fiumani more than once turned down major label deals and declined to participate to mainstream events such as the Sanremo Music Festival in order to preserve his artistic independence and maintain Diaframma's integrity.

e il Nomade Venerabile has dedicated to the leader of Diaframma a song called Fiumani, from the album Ghiaccio, released in 2004.