Sorry to bump a sorta old thread but, my athm50 sound the same coming from stereo port from asus maximus vi hero compared to analog out from that > into z5500 > with athm50 plugged into headphone socket in the control pod of z5500. thought the athm50 do sound a bit artificial in mid high/highs or maybe thats just the quality of 320kbps.
What i wanted to ask though is how much power does the port output (e.q cowon d2+ is 30mw+30mw, 60mw), as my phones are 38 ohm 1000mw, if anyone knows the output power of the z5500 headphone jack please tell me. i want hard factual scientific answers from the spec sheet/z5500 engineers, not a OH z5500 sounds bad! comments, i dont care about that, i want the facts in regards to its power output ;P