[Machine Translation] Open-air design for a comfortable open feeling. Aluminum ring and bobbin-wound voice coil. Large-diameter open-air design for dynamic reproduction. The backs of the driver units are not covered to allow air to flow smoothly and bring out the full potential of the driver units. The earpads cover the entire ear for a comfortable fit. (Product Specifications/Description) / 53mm CCAW bobbin-wound voice coil driver exclusively designed for open-air use provides dynamic reproduction. Newly designed aluminum honeycomb punch for smooth airflow