Spen began his career at the age of 13, producing mix shows for WEBB AM in Baltimore. Even at that young age, Spen founded one of the area's first hip hop production groups, the Numarx. In 1986 they wrote and recorded a track called "Girl ..
Ralf GUM’s producing since 1993 and worked with notable artists as Inaya Day, Michael Procter, Monique Bingham, Wunmi, Beady Belle or the fascinating Concha Buika. He released on top labels like Peppermint Jam, Tommy Boy, Compose, InfraCom!..