The HD 650, a flagship product of Germany's Sennheiser company, has received much praise since its release. At the CES conference in January, Sennheiser showcased its next-generation HIFI-class flagship headphone, the HD 800. Recently, Sennheiser invited numerous media outlets to test the HD 800 and visit the production line for the HD 800 at their facilities, providing us with the following valuable images.