Bartosz Obliński (a.k.a DJ SO4) is Wroclaw dj and music producer. Was born in 1986. He became fascinated by a DJ at the age of 17 when he heard Dj Daniello Mondello who played Hardstyle in Qlimax. Bartosz most liked the theme as Mondello played on four vinyls (!!), while he did move, and added themes from other tracks. He longed to gain equal fame glory as Mondello, to which still he seeks. Initially, he played on programs like E-Jay and Virtual DJ. Later, through the portal Youtube.com he learned to play on real hardware. In 2009 he went to the pub the Blue Angel, where he met DJ Risto. Under his guidance took his first steps in playing the Citronic. He realized that it is very hard work and often arduous. He plays the smaller events, including greeting, he is trying to promote as soon as possible.