Recording together as Hardfloor since 1991 Oliver Bondzio and Ramon Zenker have written German techno history. Their first EP for Sven Väth's fledgling Harthouse label, 'Hardtrance Acperience' pioneered their trademark simultaneous use of multiple Roland TB-303 synthesizers and became so successful it even entered the UK charts. Their remix of Robert Armani's 'Circus Bells' became another landmark hit, and many successful albums and singles followed over the course of two productive decades.