Sonic Defender
Headphoneus Supremus
Yeah, the Momentums are dynamic and meant for phones, so they have stupidly high sensitivity. The PM-3 sounds fantastic out of the iBasso DX80 DAP, I mean just uncanny good, so if you are alright with keeping a player as well as a phone, it's highly recommended, but I can understand people wanting something that plays all of the stuff on their phone, so you made the right choice for your usage.
I think it's just the phone thing. The PM-3 sounds really bad from a phone, closed in and bass anemic for sure. I have a DX80 as well as I mentioned above and it's just unreal how good the two go together. I think it sounds better than a lot of rigs that cost quite a bit more. It really gets my energy going. Usually when I'm on the go I miss my LCD-2 and Bifrost/Asgard 2, but the DX80 is like 90% of that rig.
Like someone above mentioned you need to get the Onkyo DP-X1, that is one bad ass DAP. I can not get enough of it with my Alclair CIEMs and yes it sounds awesome with the PM3s but the Micro/DX80 still sound better with the PM3s to me. These PM3s need a little more oomph to reach there potential which most smart phones are unable to do.
True, but if you go balanced the DP-X1 is more than enough quality power for the PM3, at least I think so. As you know I ran the PM3 balanced with the DP-X1 and it was an excellent pairing for sure. Still prefer he B&O H7, but they are different enough to be sure.