One of the things I so love about Dita is the fact that they never use off the shelf parts. Every element of the design is custom specced to their needs. This includes the 2 pin plug connector and socket. Most companies use off the shelf comnectors and pins. As such the socket is almost always the same, 2 thin metal contact rings set in plastic, and these invariably loosen with repeated plugging and unplugging. Now as for Dita, if you had a look you would see that they have extremely think chunky contact rings as sockets that are far less likely to loosen with time. Besides this, there are actually metallic spring leaves within the sockets which grip on the pins, enhancing contact and durability. As a result of this, the stock cable pin design is actually slightly different from the standard 2 pin connector. The pins are longer, and are specially tapered in a way that actually makes them snap into the socket somewhat like what FitEar sockets do, albeit to a smaller extent. That said, the dream is indeed compatible with standard 2 pin cables. I would enquire about the stock cable with the previous owner if possible.