the sound these put out be nearly unimpeachable . I be use they with a Ray Samuels Audio Predator usb dac\/headphone amp , source by a modify HP Tablet PC -lrb- usb -rrb- and a ASUS Transformer Prime -lrb- analog out -rrb- and get good result . the sound be relax , detail natural , although I think the high be a bit roll off . I would not use these straight out of a low power source . I do have a couple of con - first , as some other reviewer have point out the attachment of the can to the headband seem flimsy - it do result in unsurpassed comfort for a headphone this large . the finish on the mahogany earcup be less than superb . the cord be long and heavy and make the phone unsuitable for portable use and less than optimum even in home with a ipod or tablet - they be design for use with a headphone amp , a control amp\/processor or receiver . as the headline for the review note , these be make in China , which be a disappointment when buy a luxury grade product from a japanese manufacturer . give my experience with the limited lifespan of most chinese make electronics , I wonder what they longevity will be . if I have pay full price for these they would be go back . I do have to say kudos to Amazon for a great price and fast prime delivery .