Thanks for the comments, aberyclarck and tobes, good info.
Any amp can be made to sound relatively more or less sterile; so much depends upon the rest of the system. As well, one man’s sterile is another’s "accurate", etc. However, the amp is quite a bit less colored than many other SS and tube amps. If a person is used to and adores the thick, syrupy, darker sound of tubes, they won’t like the AHB2.
Regarding the Schroeder Method, I am using Y cables from Audio Sensibility currently (previously I had obtained my own Y cables from online and pro sound sources). For RCA both Y cables are identical, but for XLR one needs a "splitter" Y cable and then to reverse it a "joining" Y cable. My terms for lack of better description. I am very pleased with the quality of the Audio Sensibility Y cables.
I have used Clarity Cables XLR in Schroeder Method, and am now reviewing a full set of another fairly affordable cable manufacturer. The power cord of this manufacturer also uses a slightly smaller round barrel on the IEC, so I can use these wonderful power cords. They are making a nice improvement over the older Harmonic Technology AC-10 Power Cord I had been using.
As with anything else, there is a spectrum of acceptance/rejection among engineers and designers/manufacturers. Some are very open and authentically interested in my ideas. Some are only interested in a good review, i.e. accurate and fair. I understand both perspectives and respect them.