The go-to hub for all of your sources The HDV 820 unlocks the potential of your Sennheiser headphone collection. Expect class-leading DAC and headphone amplifier technology with a plethora of state-of-the-art I/O and world-class conversion. Maximizing headphone performance The HDV 820 is a reference-grade solution for critical listening tasks. Features Next generation of acclaimed digital headphones amplifier Class-leading ESS 9028PRO SABRE digital-to-analog converter Performs brilliantly with digital sources, whether connected optically, coaxially, or via USB Features balanced (XLR) and unbalanced (RCA) analog inputs Perfectly complements the Sennheiser audiophile headphone range Capable of playing DSD256 files of up to 12.3 MHz, in addition to PCM files up to 32-bit and 384 kHz sample rate Audio outputs include XLR3, XLR4, a 6.3 mm jack socket and 4.4 mm Pentaconn socket