From Focus Camera on eBay.
BeyerDynamic's flagship headphone (2nd Gen with removable cables). Rarely seen at this price. I own both these and the DT1990, and prefer these by a fairly large margin. But be warned, they are extremely picky with sources. Without proper sourcing, treble energy can be a little excessive for some. I use with the Schiit Lyr 3, which is an excellent pairing.