I used Stereophile's loan sample of the top-of-the-line Audio Precision SYS2722 system to measure the Simaudio Moon Evolution 650D (see www.ap.com and the January 2008 "As We See It"); for some tests, I also used my vintage Audio Precision System One Dual Domain and the Miller Audio Research Jitter Analyzer. As well as playing CDs containing test-tone files, I drove the Moon Evolution 650D with S/PDIF data from the Audio Precision analyzers and USB data from a MacBook running Mac OS10.6.8 and Pure Music 1.8.
The Moon 650D's S/PDIF inputs successfully…