This combination represents Sennheiser's reference-grade closed-back headphone system, pairing the innovative HD 820 closed-back headphones with the HDV 820 digital headphone amplifier and DAC to deliver a pristine, uncompromised listening experience for critical audiophiles. HD 820 Closed-Back Audiophile Headphones The HD 820 headphones set a new standard for closed-back audiophile sound, aiming to achieve the spaciousness of open-back designs while offering superior ambient noise attenuation. Innovative Closed-Back Design: Utilizes a concave Gorilla Glass reflector over the ring radiator transducer to reflect sound waves to an absorber, minimizing resonance and creating an impressively wide, natural sound field typically associated with open headphones. Acoustic System: Features the 56mm Ring Radiator dynamic transducer system for high-fidelity sound, a feature leveraged from the legendary HD 800 S. High-End Specs: Offers a wide frequency response of 6 - 48,000 Hz (-10 dB), a high impedance of 300 Ω, and extremely low total harmonic distortion (< 0.02% at 1 kHz, 100 dB). Comfort: Designed for extended listening with an adjustable metal headband and luxuriously comfortable microfiber padding. HDV 820 Digital Headphone Amplifier The HDV 820 is the ideal companion for the HD 820, designed to unlock its full potential by delivering an extremely precise and clean signal. Reference DAC: Incorporates the class-leading ESS 9028PRO SABRE digital-to-analog converter to handle digital audio up to DSD256 (12.3 MHz) and PCM files up to 32-bit / 384 kHz. Versatile Connectivity: Features a comprehensive set of digital inputs (Optical, Coaxial, USB) and analog inputs (Balanced XLR, Unbalanced RCA). Multiple Outputs: Provides a variety of output options, including balanced (XLR3, XLR4, 4.4 mm Pentaconn) and unbalanced (6.3 mm jack socket) connections, accommodating virtually any high-end headphone cable. Amplification: Built to perfectly complement the Sennheiser audiophile headphone range, delivering the power and purity required for high-impedance headphones like the HD 820.
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