Got the Sony MDR-XB30EX delivered to me yesterday, just 2 days after placing the order.
I had been using the Xiaomi Piston Mi 2 prior to this, and other than that I've used the Cowon EM1 but only for a day, borrowed from my friend.
To be honest, when I unpacked the thing, plugged it into the Z Ultra, and played a hindi song ( Kick- Hangover ), I was terribly dissapointed. The bass was so overwhelming ( not in a good way at all ) it ruined the song. The highs were completely imperceptible , all the tones were accompanied by a deep obnoxious bass.
I tweaked the equalizer settings quite a bit to finally get the sound to my linking, somewhat.
I used the Sony headphones on my Nokia 108, and it sounded surprisingly good on it. The earphone compensates for the lack of processing of the audio maybe.
Finally, I used the headphones with my Micromax Yu. Sound is quite good, I am using the Musixmatch player. But it is very difficult to recommend IEMs among the ones you mentioned, very few people might have had the opportunity to use all of them.
English songs, trance and EDM, sounded really well on the Sony XB30EX, really well. Hindi and Bangla songs ( the mainstream ones which are loudly played on the streets), too much forced bass.
The Cowon EM1 in my opinion is, 'moderate', in all aspects, and that is what many people want, so you won't go wrong with those, however, each IEMs have their own pros and cons, select according to your needs and tase in music.
