Grado's ability to combine lightness with extreme rigidity and internal damping has been put to good use on the SR125i earphones. Based on the same design as the SR80i headphones, the SR125i headphones also features a further improved driver and cable design utilising UHPLC (Ultra-high purity, long crystal) copper voice coil wire. With the new 8 conductor cable design you will notice improved control and stability of the upper and lower range of the frequency spectrum, with both better supporting Grado's world renowned midrange clarity. Again the driver's diaphragms are put through a special 'de-stressing' process in order to enhance inner detail. Bass, midrange and treble are all more open and you will enjoy the fine tonal spread and balance.