Ultimate Quality? Well, the jury is out while I'm still burning these in. But from initial listening using my iBasso player, they do sound very good indeed. Not sure of the techy gubbins behind the dual balanced armature driver and the single dynamic...Read more driver but I guess Dunu had their reasons for this approach and it's reflected in the sound quality they produce.

I'm not a huge music or sound boff but this product really surprised me. You can genuinely tell a difference between other IEM's, and with a bit of fiddling and customizing these are a great fit. For someone with a fairly sporadic music taste, I can ...Read moresafely say that these headphones sound amazing listening to any genre. These are a slightly more expensive pair than I am used to buying, but you can really see (hear) where your money goes. Amazing product!