Interesting remarks from Jeff Fritz, Soundstage. What he said about Calyx Femto as compare to a more expensive one…
"For $6850 you get a jewel-like aluminum case and a femtosecond clocking circuit that promises vanishingly low levels of jitter. The Femto invites the question: Why spend more?"
The link : http://www.ultraaudio.com/index.php/equipment-menu/344
picture taken from gfmod.pl