The voltage checks all came out as expected, so the amplifier was put into use for an extended listening session. The most succinct description I can give is that the amplifier is clean, very fast, neutral in color, and musically powerful.
Here it is on my work desk during its first listening session.
After a couple of hours with various types of music, I can find no faults or weaknesses. The amp took everything I could throw at it and performed admirably.
It will take a few days to get the full technical testing of the amplifier completed. But for now I am simply enjoying its power and clarity. This is a very fine sounding amplifier.
As always, questions and comments are welcome.