Rolf Ellmer (born 3 December 1960), also known by the names Jam El Mar and Trancy Spacer, is a classically trained musician and composer (concert-guitarist) and has become one of Germany's most known house and trance producers.Together with Markus Löffel (alias Mark Spoon), also from the German music scene, he has recorded under several monikers such as Jam & Spoon, Tokyo Ghetto Pussy and Storm.