An electrical engineering graduate (B. Sc.) from the National School for Radio and Film, Brussels, Belgium (now Katholieke Universiteit Leuven, Leuven, Belgium), Bruno Putzeys worked for Philips Consumer Electronics and later Hypex Electronics, where he designed class-D audio amplifiers and sigma–delta AD/DA converters. His current research interests include designing digitally controlled loudspeakers for Kii Audio and researching linear motor systems and their control together with L. Risbo, with whom he cofounded Purifi for that purpose.