He was a Spanish musician, composer, producer, performer and arranger. Calderón started his musician career with a jazz quartet in 1960. He won award Block 6 - award for best jazz album in the United States. Juan wrote some songs for artists such as Luis Miguel, Julio Iglesias, Chayanne, Nino Bravo, Cecilia, Camilo Sesto, Paloma San Basilio, Rocío Durcal, David Bustamante and Mari Trini. He died of heart failure at a Madrid clinic.