ETHER C is MrSpeakers award-winning closed-backed headphone. ETHER C set the new standard in closed planar magnetic headphone comfort and performance. On the comfort side, it uses our award-winning Nitinol headband to achieve ultra-light weight and incredible comfort, and the ultra-rigid carbon fiber cups add only 1/2 ounce (~12 grams) to the headphone's weight. On the performance side, ultra-rigid carbon fiber cups deliver unrivaled "open" sound in a closed headphone. ETHER-C is a 100% MrSpeakers design and is built and tested in San Diego, CA and includes a 2-year parts and labor guarantee.