Straight out of the box the X1 sounded thin, bright, flat and monochrome. I thought I had made an expensive mistake and even tried to return it. It took well over t he recommended 100 hours to run in - more like 500 hours. Over time its sound deepened, filled out in three dimensions, acquired more tonal depth and more texture. During the first week of using the X1, I thought the Mytek Manhattan II sounded much better, but over time the X1 caught up to the Mytek and then convincingly surpassed it. Now it sounds truly magical, but it took a long time to get to that point.