Jam El Mar

Rolf Ellmer (born 3 December 1960), also known by the names Jam El Mar, Jam, and Trancy Spacer, is a classically trained musician (concert-guitarist), producer and DJ. He has become one of 's most known techno and trance producers.

Together with DJ Dag), which had great success all over the world and is said to be among the pioneers of trance music.

He also works as a producer and remixer for other artists.