This is my first high end pair of headphones. I also have the ultrasone Ultra pro 900, but I wanted something that pairs better with my iphone without having to use an amp and was smaller than the more fuller size 900's. My question is, does break in really make a difference on these higher end cans. I am not yet blown away by these. While I can see that they will pair better with my portable devices without an amp, I have noticed that at higher volumns, the highs are almost to high. I was listening to some vocals where is is almost hard to listen to. Being my first higher end pair, should I just be patient and give them a chance. The look and feel great. 2 out of 3 wont cut it though.