Sennheiser HD800S Over-Ear Wired Headset (506911) is a high-end audiophile reference open-back headphone. With 300 Ohm impedance, it requires a powerful audio source and delivers studio-grade sound. Its 56mm ring radiator drivers provide extremely detailed, wide, and natural sound staging. Innovative absorber technology reduces unwanted resonance, revealing fine musical details. The angled ear cup design creates a highly natural and spacious listening experience. It includes both 1/4" single-ended and 4.4 mm balanced cables for high-end audio setups.