Unique in the history of Italian progressive music, New Trolls were leaders and were for a time the top band in Italy. In 1973, New Trolls split into two camps, the hard-rocking IBIS and the symphonic-oriented New Trolls Atonic System. They crossed many different permutations of line-up changes, many musical stylings… and great hits, passing through beat, pop ballads, progressive rock works, hard rock, and melodic pop followed groups like Genesis and PFM.
In 1975 Fabrizio De André called Gianni Belleno, Ricky Belloni and Giorgio Usai (from the band "Nuova Idea") and Giorgio D'Adamo for his Italian tour: the New Trolls lacking components were only Vittorio and Nico, which were contacted in 1976 and decided to join the band again. In the same year New Trolls published an anthology of their hits and "Concerto Grosso n°2": Luis Bacalov and Sergio Bardotti proposed to go on with the musical experiment started in 1971 and the success was immediate. Japanese reissue of the progressive rock act's 1991 album.
In 1971 New Trolls released the album which was to become their trademark: Concerto grosso per i New Trolls. The album was a fantastic example of early symphonic rock experimentation, with classical music arrangements written by composer Luis Enriquez Bacalov. As the first effort in Italy to merge rock music with classical treatments, this album is still considered one of the most important Italian progressive rock releases ever. Japanese reissue of the progressive rock act's 1991 album.