Beyerdynamic Like everything RIO sells, we look at genuine history and products with real engineering. It all started with the talkie: electrical engineer Eugen Beyer started his own company in Berlin in 1924 to build cinema speakers. His "Elektrotechnische Fabrik Eugen Beyer” laid the foundations for a world leading manufacturer of headphones, microphones and conference systems – and for today's beyerdynamic GmbH & Co. KG. Until this very day, around 90 years ago - Eugen Beyer’s heirs feel bound by the company’s tradition and by its visionary, pioneering founder’s values.