Check the listing for details. Beyerdynamic DT 1990 Pro ( Open-Back Professional Reference Studio Headphones ). Color: Black, Condition: Used, Made in Germany. Listed at 485.00 USD. Selling professional studio reference headphones Beyerdynamic DT 1990 Pro. They were used by me as reference headphones to check fine details while creating mixes. The condition is excellent 10/10 — no mechanical or technical damage at all. They were never overloaded, as they were always used with a professional audio interface, the RME Babyface Pro FS. Full set with original case included. The set comes with the headphones, two types of cables, and two sets of ear pads. The cable connectors are still in their original factory protective film and have never been removed. They were used very carefully and always stored in the original case in a dry place with proper humidity conditions.