On desktop products, the output impedance tends to be larger than on their portable counterparts as they are frequently used with high-impedance headphones and operate out of a wall socket.
On portable products, the output impedance tends to be smaller as they are used with earphones and must operate on a battery, which cannot provide the high voltage necessary for a large output impedance.
Well writen and great effort, still would love to see a really test of sencitive EIM's with this player.
We might conclude that the market is changing and that high impedance DAP will become more commen. Head-fi'ers should take up the challange and we all can now start spending money on creating A low and high impedance set up:)