Rob80b
Headphoneus Supremus
"A history of sound in perfection - An insight into Sennheiser´s high-end world- but, Orpheus HE90 were released in the early '90s
The ultimate objective of headphone development is to reproduce sound that is as lifelike and direct as possible."
https://en-de.sennheiser.com/news-a...on-an-insight-into-sennheisers-high-end-world