If your going to be using the he400 on a handheld device what's even the point of owning them!?
It's like having a Ferrari and puting 87 octane gas in it. It's going to run like crap
You need around 700mw to 1w at least to get your money's worth out of an ortho phone.
I disagree, this can sounds really quite good out of an X3. Yes, it could sound better with better amping, but its not the waste of time you're implying either.
The x3 has 100x the power of consumer daps so what you said is irrelevant to my point,
A consumer MP3 player just is not going to take advantage of all the can has to offer. If your going to be using one as a source you should just get a more efficient pair of cans that is paired better with a low power device