Sennheisers HDV 820 is the next generation of its acclaimed digital headphones amplifier designed to complete the Sennheiser audio experience and perfectly complement its high-end audiophile experience for the ultimate acoustic performance. There are two things that mark a quest for perfection: It is never completed and it has the potential to bring out the most extraordinary things with the power to shape the future within its field. The HDV 820 which will surely change the way you listen to and experience your music. That is if you are lucky enough to possess headphones capable of turning the extremely high-quality audio signal delivered by the HDV 820 into an aural quality just as supreme.