plakat
Headphoneus Supremus
They are certainly much easier to drive than the old DT770/80 (or 250), yes. My impression is that Beyerdynamic feels to have optimized the new drivers so that slightly heavier voice coils are not that much of a problem any more. Therefore they aim to support as many sources as possible, for the Pro models obviously USB interfaces are an important segment.I think the 48 ohms and high sensitivity of the DT 700 an DT 900 is due to Beyers aim that they work well with pro USB audio interface, which have notoriously low headphone amp output.
I think the 80ohm impedance was due to older studio equipment requirements, but nowadays there’s a much larger market segment using low-powered equipment that’s not so happy with 80ohm load and much less with rather power hungry 80ohm headphones