beyerdynamic DT 100 Headphones, 16 Ohm, Black at Gear4music
Amazon.com: Beyerdynamic DT-100-400OHM-BLACK Closed Studio Headphones for Monitoring, EFP/ENG and Live Applications, 400 Ohms, Black : Musical Instruments
Help figuring out impedance on Beyer DT 100 | Headphone Reviews and Discussion - Head-Fi.org
Beyerdynamic DT 100 / DT 108 / DT 109 / DT 150 Professional Studio Headphones | eBay