With ultra high sensitivity of 107dbmw these headphones will allow you to push volume right up to the max without sacrificing the clarity of the song a 12mm neodymium driver allows the same sensitivity and low distortion as a 16mm driver just smaller with the small size these headphones are able to sit neatly at the back of the ear for an extra comfortable fit and improved sound isolation the casing around the headphone bud is brass which is an excellent metal for suppressing unwanted vib