EV615 is a research and development of targeted KTV, singing sound, a change in the past, narrow band, voice tight and other defects, EV615 highlight the high degree of sound delicate, low flexibility and softness, when the concert sound is more smooth, more full of emotion frequency electronic components used in Germany's top brand capacitors, a smaller angle, filtering extremely pure, ultra-high frequency part in order to play more vividly, the entire sound field structured, space suddenly see the light