The cause of airiness and luminosity
About COS EngineeringCOS Engineering, founded by three close friends serious about audio entertainment, is dedicated to developing gear for the digital era, that renders music listening a sheer pleasure. D1, COS Engineering's first product, made its debut in 2014.
Roon Ready deviceRoon Ready network devices have Roon’s streaming technology built in, and are certified by Roon Labs to provide the highest level of quality and performance in network streaming.
Roon Tested deviceRoon Tested devices work over USB, HDMI, AirPlay, Google Cast, and other protocols. They have been profiled by the Roon team to ensure simple setup and effortless daily use.