FYI, especially with the HDAMs, the sound only settles down after 350 hours (100 hours at the factory during testing + 250 or about two weeks of being left on continuously). We had weird issues when we first were playing with HDAMs in various DACs, such as the treble disappearing for 50 hours. Overall though, I found that with use some harshness in the sound tends to disappear.
I had to look into the site's glossary to learn what a HDAM was, but now I know (I learn stuff every time I visit this forum). Now, am I right in concluding that in the Compass 2, the HDAM is what is referred to as the Earth/Sun/Moon OPA on Audio-gd, and that as such, it should not be used when the signal passes through the DAC (only the via the line in)? Is there other(s) HDAM(s) already wired in the DAC signal path that I should know about? Finally, if there is indeed no HDAM in the DAC->amp signal path, does your comment regarding settling down of the sound still apply?
Thanks to you and to all the others for answering my questions! I try as best as I can to figure most answers myself, but some information is harder to find out than others.