John Engler | Hartmut Esslinger | Hartmut Mehdorn | Engler | Hartmut Neven | Hartmut Lutz | Hartmut Kallmann | Hartmut Heinrich | Hartmut Haenchen | Hartmut Geerken | Hartmut Erbse |
Well-known results of their collaboration are songs like Fiesta by Vanessa S. feat. Ferris MC, a remix of a Deichkind-song as well as several other songs and remixes for German artists like Hartmut Engler, Florence Joy and BAP.