Duo Kie, a Spanish rap group from Madrid, was formed by Javier Díaz (Locus) and Eduardo Sánchez (Nerviozzo). Before joining forces, Nerviozzo released several demos, including "3 0‘ Jazz" in 1995 and "Otanisessah" in 1996. Locus also had a solo release with his first LP, Un día más en la vida de un don nadie, under the name "Locus Amenus" in 1998. The duo released their debut maxi, "2000 y pico", in 1999 and their first full-length album, La famosa 12/13, in 2000. Their second LP, Non freno, was released under the name Duo Kie in 2004. The group's fourth LP, 21 Centímetros, was released on March 26, 2008, featuring video clips for "Nosotros lo hicimos" and "Yeah". On December 19, 2009, they released a mixtape titled Tremenda Vendetta. Their subsequent album, De cerebri mortis, was released on April 5, 2011.
