This time I'm focusing on Fidelix SH-20K. They said digital sounds are unnatural, so they were tired from listening. Makers as Pioneer and Denon tried improving of this point. techniques of Fidelix SH-20K is like that. It reproduce over 20kHz ranges by random noises. Its handling is very easy and is very effective. CD sounds obviously getting clear and smooth. It would be better use with book shelf speakers as YAMAHA NS-1000M. I recommend you to use SH-20K for digital audio sounds. If you would like to know more contact us. Nipponbashi Hiroshi Koyama