Key word is “demanding” headphone. Headphones on good desktop set up and DAP don’t perform on same level.Honestly.. not sure why people are saying this. my wm1a sounded amazing with the dt990 pro 250 ohms, and that's out of the 3.5mm on 90volume.
I think the wm1a/z, especially hardware modded, can definitely pull off most most headphones unless they're seriously hard to drive or are planars, and usually those options are huge bulky open back.. in which case, might aswell get a desktop rig because you're not going outside with that on your head.
IEM not so much. IEM in general out of Bliss/Oor and out of DAP are more or less same. But plug in any Sennheiser or ZMF in Desktop amp and DAP and you will feel the difference.
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