morbius:
A last point ... the experience at Singer was anything but worthless, and I'll give you the benefit of the doubt and assume that you are being handicapped by misplaced reliance on the scientific method in thinking that only a direct A/B comparison between amps on exactly the same system in exactly the same room is valid. Those amps were not designed to be used in the same room and with the same equipment, much as your example of Maggie power requirements illustrates. Further, each amp will favor different types/brands of cabling, making their use with the same cabling an error. One is a Class-A biased triode design feeding speakers through an output transformer, the Krell monos being solid-state designs that are probably Class A up to a point and AB thereafter. Fortunately, Andy Singer is not a physicist, but a hi-fi man, and in recognition of these differences, the amps were set up in different rooms in different systems, to live or die on their own merits. In short, the only worthless comparison would be a direct A/B in the same system -- it would tell us nothing.
PS - Why do I picture you wearing one white sock and one brown sock? Your thoughts about about automobiles, televisions, ice cream, proper comparisons, 300B's, and absolutism were unsolicited and are worthless to me (and I don't need upper-case font like you do to make my points -- how presumptuous to think that I would allow you to address me that way -- how obnoxious you are).