About a year ago I began to use my budget Android smartphone instead of my Sony mp3 player. I had been putting it off for ages because I 'knew' it wouldn't sound as good. It didn't.
However with a little tweaking of the built in equalizer (did that with the mp3 player too) the differences became negliblible through my Portal Pros and various portable Sennheisers.
I much prefer not having to carry both now and the display on the phone is better too. I found the stock app with Android 5.1 had a built in equalizer, but if yours doesn't, you could something like Phonograph etc if you're using Android.
I think as long as your source files are good and encoded at 256kb or above you will be good with the Momentum's.
It's way too extreme for my tastes, but if you wish you might be able to eke out a better/more pleasing performance via a dedicated portable valve amp with something like the classic open backed HD 600s.
However with a little tweaking of the built in equalizer (did that with the mp3 player too) the differences became negliblible through my Portal Pros and various portable Sennheisers.
I much prefer not having to carry both now and the display on the phone is better too. I found the stock app with Android 5.1 had a built in equalizer, but if yours doesn't, you could something like Phonograph etc if you're using Android.
I think as long as your source files are good and encoded at 256kb or above you will be good with the Momentum's.
It's way too extreme for my tastes, but if you wish you might be able to eke out a better/more pleasing performance via a dedicated portable valve amp with something like the classic open backed HD 600s.