my heed has only been in my hands for about 2 months now i guess, but i can say enthusiastically that i am impressed. i love my supermicro, but when i take my head headphones out with the heed, it is like the older sister. it is also long, black and a rectangular block, yet as it is older sister, it is prettier, with shinier hair that has been taken care of, not just carelessly whipped in a trailer. its eyes like the older sister too are deeper, full of concern for the world, evident in deeeep bass. finally, as the older sister has also begun her phd in internationisation, there is a concern for more than just the poor road in front of her. thus, as for 3d, this amp delivers. i am much impressed by the sound coming from all over, even up and down behind my ears with certain phones.
i'm no original, but i am very happy with my purchase as well as thankful to all the m's for their help and the floyd for the endless modness... cheers