Amazon.com: beyerdynamic DT-990 Pro Acoustically Open Headphones (250 Ohms) with Knox Gear Hard Shell Headphone Case and Wooden Headphone Stand Bundle (3 Items) : Electronics
REVIEW: Beyerdynamic DT 770 vs. DT 990 headphones | The Wong Janice - music producer & cellist
File:Beyerdynamic DT-990 Pro Headphones top.jpg - Wikimedia Commons