buy this amp recently to drive some high-end headphone while use my ipod . I have to say that I be really impressed . this little amp easily power my akg 702 's , which be massive phone , and my bose over the ear phone as well . for my taste , use only the first bass setting be perfect , and the sound I get from the ipod be unbelievable . with a good set of phone , this little amp work very well . the fullness and clarity of sound be better than I expect , by a long shot . the amp strap easily to the ipod , with a silicon band , which be provide . I do have to buy the ipod patch cable to connect properly , but all in all , this be a great investment . I have only own this product a couple week , but , the listen enjoyment I have already have certainly justify the price , and then some . I do have the opportunity to try one belong to a friend , but as soon as I do , I immediately get on line and order my own . if you want some very nice portable sound , this unit , at this price be hard to beat I should also mention that this amp charge easily by usb , and hold a charge for a very long time . in two week , I have charge it once , but do not really need to , and just want a full charge . I highly recommend this product .