These sound fantastic. I would say I am an amateur audiophile. I use a HRT headstreamer and a pair of Yamaha HPH-200 headphones on my pc, so I wanted a similar quality of sound when I'm out and about. I use these headphones in my i-Phone which, in my opinion, produces a fantastic output sound and these earphones compliment that so brilliantly; it is such a shame that the earphones provided with the i-Phone do not show off the potential sound it can produce. The Denon earphones have a very warm kind of 'chocolatey' sound. The bass is extremely deep and punchy but, very importantly, not overpowering. The earphones can still push through the medium and higher frequencies extremely well, allowing you to hear every layer and instrument in the song. A lot of earphones become very 'hissy' at louder volumes because they can increase the medium and higher frequencies easily, but struggle with the lower frequencies. These simply do not do that. I'm astonished how they can create a sound so perfect but not loose quality and still maintain that perfect balance of frequencies at higher volumes. But please be prepared to allow them to 'burn in' if you buy them. I've had mine a month now and they sound fantastic, but they sounded flat when I first bought them; but it is easily worth the wait. I bought mine on offer from £89.99 to £34.99, which I think is just a stupendously cheap price. I would happily pay the full price and more for these. I cannot recommend them enough.