Cdc, lest anyone get an incomplete picture of the D-100's ultrasonic noise test measurements from your quote of the Aug. 2005 Stereophile review of the D-100, here is a quote from John Atkinson's follow up in the September 2005 issue of Stereophile in which he tested current production D-100 amps as resubmitted by CI Audio:
Whereas the original sample had started out cold with about 0.05% THD+noise (including the ultrasonic spuriae), this increasing to 0.1% after an hour, the new sample began at 0.027% and increased only very slightly, to 0.0285%: a promising beginning.