Kaliber 44 is a Polish hip hop band; formed in 1994 in Katowice, Poland by Piotr Łuszcz ("Magik"), Marcin Marten ("Abradab") and Michał Marten ("Joka"). Since that time Kaliber 44 consists of only two members - brothers Abra dAb and Joka. The band has released three albums. The first album called "Księga Tajemnicza. Prolog" ("The Mysterious Book. Prologue") was released in 1996 and created a new genre - so called "hardcore psychorap". The second album, "W 63 minuty dookoła świata" ("Around the world in 63 minutes") was released in 1998.