SRF

Producer of Breakcore, Darkcore, Terror and Speedcore. Also known under the aliasses:
- Sirolf
- Narkotik Machinery (A Dutch/Hungarian Industrial Hardcore group)
- Rejects of Society (A Dutch Speedcore and Terror group)

Sirolf

Alias used to produce Industrial Hardcore, Darkcore, Terror and Speedcore. Also used to perform as dj in these styles.

Narkotik Machinery

Alias used to produce Industrial Hardcore as a group, together with Dawe (David) Szucs and Daniel Sandor, from Hungary.

Rejects of Society

Alias created by Roy Meijers, also known as dj Pariah. Nowadays Sirolf is the only member since dj Pariah left the group.