When I was in school in the mid-1980’s I was studying music recording and broadcasting. I spent a lot of time in and around various recording studios around Toronto. The single most common headset that I saw at that time was the AKG K240 Studio monitors. These were the reference grade dynamic headphones used in many facilities at that time.
The K240s are genuinely, big-ole, cans. A circumaural headphone with a semi-open design they sound great, even today. They can be cleanly driven to excessive volumes if required. Fairly efficient, they can even be powered by a cell phone or iPod.