Beyerdynamic DT 770 Studio
Way back before headphones became a multi-billion dollar industry, the options available for people to buy were rather meager. You mostly had earbuds, a selection of on-ears (predominantly Sennheiser) and professional monitor headphones, and never the thrice should meet.
The Beyerdynamic DT 770 Studio is a well-built monitor headphone which sounds more open and dynamic than its closed-back construction might suggest; The headphones offer a level of comfort not offered by other professional headphones
The DT 770 Studio suffers from limited distribution and is easily confused with other similarly-named, but very different sounding, DT 770 models; The non-removable three-meter cable means the headphone is poorly suited to mobile use