 He began beatboxing while he was learning to play the drums in Grade 7, and whenever he wasn't drumming he was inclined to mimic the sounds he made while drumming with his mouth.Beatboxing became a hobby for the young Im, and later on he decided to pursue a career in the art.KRNFX began his beatboxing career in 2007 at the South Korean Beatbox Championship in Seoul, where he finished the competition in first place.