Originally Posted by reginalb
I think that he is trying to argue that the problem isn't the player, but that a manufacturer would make a low impedance iem. That there are two possible solutions, either:
1. Lower output impedance on the amp
2. Higher input impedance on the iem
His inquiry is why 1 is what we demand, while we let headphones makers produce low impedance iems without questioning that.
I'm not arguing anything, actually. I'm just pointing at - what I find - unfair and hasty judgments regarding the AK100.
People tend to say this player is flawed (= piece of c**p) because it has a high output impedance.
If one takes it the opposite direction, one can say BA iems are flawed because they have an uneven impedance across the spectrum.
The link lee730 posted (which, by the way, is quite informative! thx for that) shows that the player may not be a good match for BA iems, that's not unexpected. That doesn't make it a flawed DAP for all that.
You wouldn't call a Stax headphone flawed because it does not work with regular headphone amps. The same applies here: the AK100 was - apparently - designed for dynamic earphones/headphones users.
That's a choice they made. It might be a bad one for some, but one should not disqualify a product because it does not meet one's requirements.
Note: the recommended headphones are not particularly high impedance ones either, they all operate < 80 Ohm.