Sennheiser HD820 Over-Ear Wired Headset (507435) is a high-end audiophile over-ear wired headphone. Featuring “Transparency” technology, it delivers a natural and wide soundstage, bringing an open-back listening experience into a closed design. Built with a selection of premium components, it offers highly detailed and balanced audio performance. With 300 Ohm impedance, it pairs perfectly with high-quality audio systems. Its premium design and materials reflect superior build quality and performance.