I'm using my iPhone 4 to power them and they sounded normal, I just now finished updating the software to the iOS6 and there is a huge difference sound, to the point that I was blown away. Mind you I have the EQ set to Bass Booster due to my initial reaction with the IEM's but damn.. It's night and day right now. The bass is nowhere BEAR as muddy, its very nice and controlled, as before and the upper mid range is superb. Vocals are crystal clear and they sound a lot less transparent. Highs are a little bright, but I'm still shaking right now.
Anybody have any rational explanation?