Koh was formed in summer, 2003 in Karlovac, Croatia. when vocalist Peda Cetinjanin joined the trio of Bojan Petkovic (guitars), Stjepan Perkovic (bass) and Bojan Ulemek (drums). The next year Koh won the local band competition in Karlovac. Two years later, Dario Lonjak (keyboards, samples, effects) joined the band, which led to the fusion of modern rock metal and elements of industrial/electronic music in the songwriting process. In 2007.