I finally received my X0X0's and the first impression they give me is that they sound somewhat like the HE-400 I also own, but with more texture to the entire sound. The bass is absolutely masterful; reaches deep, good control and rumble/slam. The soundstage gives me the impression I am sitting in a car, which is good for a closed headphone but not excellent. I think the X0X0's would not be my go to cans for gaming or watching movies, but for music listening What actually surprises me the most are the organic mids, and the little nuances in sound that can be heard even though there is such a huge bass body present. The highs are definitely hyped up to my ears but far from being harsh. Now when it comes to accuracy, imaging and speed these don't do exceptionally well. I actually find the Soundmagic HP150 at half price doing a better job in those departments. But what these X0X0's do have over the HP150 is pure enjoyment within all music tracks without sacrificing a hint of quality. The X0X0's spectrum is just brilliant and fun. These are just my first impressions but I get the feeling these headphones are an instant must have for those who want to get the most out of their music listening.