Amazon.com: Sennheiser HD 800 S Over-the-Ear Audiophile Reference Headphones - Ring Radiator Drivers With Open-Back Earcups, Includes Balanced Cable, 2-Year Warranty (Black) : Electronics
Sennheiser's new Orpheus headphones cost $55,000 | Engadget
SENNHEISER HE 1 “REVIEW” | The Headphoneer
Sennheiser Orpheus HE 90 Headphones + HEV 90 - Buy & Sell Audio and Computer Components - Audiophile Style
High End 2014: Sennheiser Orpheus vs Eternal Arts - Part-Time Audiophile
CES 2015, The Personal Audio Perspective: Sennheiser Orpheus - Part-Time Audiophile
Hands on review: Sennheiser Orpheus Headphones | Digital Trends
Hear the unheard – HE 1 | AudioCirc.com
I didn't listen to a pair of $55,000 headphones | Engadget