The D10 is an engaging sounding iem that has punchy sub-bass, clear midrange and crisp treble. The soundstage contributes to a spacious feeling. There is a vibrant presentation that provides an captivating listen. In addition, the D10 provides a comfortable fit and it comes with the ISN S4 as its stock cable. The ISN D10 is the latest IEM from ISN and it delivers impressively.