Since they found out they had a shared passion for hardcore music while they both attended high school, J-Roon & Kosmix have teamed up and have been playing together ever since.

Throughout the years J-Roon & Kosmix have developed their sets towards the more industrial and up-tempo variants of hardcore. J-Roon & Kosmix appeared on major events like Thunderdome, Footworxx, The Qontinent and Nature One next to numerous smaller events and are part of the Negative Audio label. With tracks on Negative Audio, DNA and Thunderdome and a lot of new productions coming up, J-Roon & Kosmix are working hard to introduce the world to their vision of hardcore!