FSB

FSB (Bulgarian: ФСБ) (abbreviation for Formation Studio Balkantone) are an influential Bulgarian progressive rock band, started in 1976 in Sofia as a studio project. FSB achieved great success in the 1980's and performed in numerous countries across Europe. Their collaboration with singer Jose Feliciano resulted in the album I'm Never Gonna Change and a Grammy award in 1990.
Current members
Rumen Boyadzhiev - vocals, keyboards (1975-present)
Konstantin Tsekov - keyboards, vocals (1975-present)
Ivan Lechev - guitar (1979-present)
Former members
Aleksandar Baharov - bass (1975-1983)
Petar Slavov - drums (1979-2006)
Ivaylo Kraychovski - bass (1983-2007)