Thanks, George. I listened for the "clicks" from the speakers with nothing playing. The result...

99
98
97
96
-click-
95
94
93
-click-
92
91
90
89
88
-click-
87
86
85
84
83
82
-click-
81
80... and below this I can't hear any clicks.

I did this several times to make sure I had the numbers right. Don't really know what to make of it, since the spacing between clicks isn't uniform.

Any ideas?

iMac -> Sonos -> Empirical Audio reclocker -> G68 (modded) -> Pass Labs XA30.5 amp -> Focal 1027be speakers + JL Audio F113 sub. Pioneer Elite PRO 151FD 60" display.

G68 mods... Custom power supply, Audiocom Superclock 4, Rubycon capacitors, WBT Nextgen connectors, ultra low noise op amps, analog output buffer, DSPC c00044, Revelation One filter.