Sennheiser HD820 Closed-Back Headphones Pre-Owned MFAST frequency acquisition and MCLK3

MFAST frequency acquisition and MCLK3 asynchronous clock

OCXO Oven Controlled Crystal Oscillator clock controls all SPDIF and AES/EBU outputs

built from enameled silver-plated copper conductors with custom MMCX connectors

plus the headroom that makes orchestral and dynamic material feel right

Quasi mono directly heated double-diode valve-rectified B+ power supply

Sennheiser HD820 Closed-Back Headphones Pre-Owned MFAST frequency acquisition and MCLK3Sennheiser's flagship closed back headphone, the HD 820 uses Gorilla Glass ear cup covers with a concave design borrowed from reflector telescope technology to redirect sound reflections away from the driver. The result is a closed back headphone that sounds unlike any other. Type and Technology Over ear, closed back, dynamic. 56mm ring radiator transducer derived directly from the HD 800S, with concave Gorilla Glass ear cup covers that manage