Open Box - beyerdynamic DT 770 PRO 250/80 Ohm Over-Ear Studio Headphones Quality | eBay
Headphone Showdown: Beyerdynamic DT770 Pro 80 Ohm vs Beyerdynamic DT770 Pro 250 Ohm | by Alex Rowe | Medium
metal571 on Twitter: "My "vintage" older chassis DT770 Pro 80 ohm sounding like the one I originally reviewed vs. the less bassy, brighter type made possibly during the period where Beyer stealth