The IEMs in question that just came in today, the Ultrasone Pyco. I have the Edition 12s right now and am enjoying them so far despite not having a decent amp to pair them with just yet so I figured I'd give US a try with my portable phones. Well, the sound with these is very forward. It's also very treble heavy, though not harsh. Rather than having a boosted treble everything else just seems lessened.
What I'm asking here is if this is something typical of all IEMs(lots of treble, forward, small soundstage, everything sounds 'fun-sized' unlike with full size headphones) or if it's just this pair. I ask as I've vaguely considered swapping out my full sized headphones and moving over to in-ears. This is because I am stuck in a noisy environment for the next few years.
Also if this isn't true of all IEMs, how do some of the best compare with high end closed back(not necessarily portable) headphones with regards to soundstage size and airiness? Ideally I want airiness and isolation, who doesn't?