Kaliber 44 is a hip hop band formed at the end of 1994 in Katowice, Poland by Marcin Marten aka Abradab, Piotr Łuszcz aka Magik and Michał Marten aka Joka.
The group is dubbed the most influential Polish hip hop band, while their so-called hardcore psycho rap style is the most prominent.
"Księga Tajemnicza. Prolog", released in 1996, was the first Polish hardcore psychorap album and the second one where live-scratching technique was used. Their second album – "W 63 minuty dookoła świata" (released in 1998) was completely devoid of psychorap style and still today is regarded as one of the most important albums in Polish Hip-Hop.
The third album was called simply "3:44" and was released in 2000.
Their fourth album called "Ułamek tarcia" (released in 2016) has confirmed bands reunion.