I used Stereophile's loan sample of the top-of-the-line Audio Precision SYS2722 system to measure the Musical Fidelity M1CLiC (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, and first updated the M1CLiC's firmware.
Looking first at the M1CLiC's performance as an analog preamplifier, the input impedance was usefully high at close to 100k ohms at low and middle frequencies, dropping inconsequentially to 48k ohms at 20kHz. The…