I have always fancied trying a set of denon's ,so when i saw the now aging AH-C710 in a local store i decided to pick up a set and put them through there paces and see how denon's top in ear phone stacks up to the other phones i own . At less than half the price of phones like the w4 or Sm3 so far i am very impressed with the sound coming out of the C710 , thunderous bass ,that does not distort even when eqed up a bit,and it is a well defined bass, not as warm as the bass on my monster pro golds but better quality .Treble is nicely extended and is delivering lots of detail and so far i have heard no hint of sibilance coming from these iem's in the couple of hours i have had these in my ears so far. The midrange is very much present and in no way compromised by the bass ,in fact the upper midrange/mid treble is very bright ,one of the brightest i have heard on an iem ,therefore electric guitars etc are often very dominant , i am hoping this will tone down a bit with burn in ,otherwise i will just eq that frequency . These come with a neat little leather case although it looks a bit fiddly to use , three different sizes of firm plastic/silicon tips and a single set of medium comply t400 tips as well as a shirt clip. The driver housing is a hybrid metal type material ,cable noise when rubbing the cable is minimal ,most likely due to the radial cascade damper built into there design ,build quality over all feels pretty good but i would have preferred a more substantial cable as it is on the thin side and i would have preferred a one piece cord of decent lenght rather than the two part cord supplied ,which is just a bit to short without the extension and way to long with it,but not a Major problem. These are most likely the most efficient phones i own ,easily on a par with my w3 and se530 ,so very easy to drive and like the w3 these are silent in-between songs,no hiss . Will add comparisons with some of my other phones in time if anyone is interested , and a picture of two when i get a new battery for my camera.