S.H.O.K.K. (Marco Guardia & Claudio Pettannice) discovered their passion for electronic music during their school days. They worked together for 5 years. As their taste of music begun to change, in 2003 they decided to split and go their own ways. After nearly 4 years and many many emails and messages from the hardtrance community S.H.O.K.K. returned to the scene in 2008 with Nicolas Perrottey replacing Marco Guardia.