I'm gradually coming to the conclusion that data cables are constantly emitting electromagnetic interference that plays havoc with the electrical supply of the house. STB seems to be able to confine these emissions within the cable, once it is treated. It doesn't matter if the cable is part of the sound system, ALL data cables in the house ultimately need to be treated. Obviously some more than others, i.e. the ones on the same circuit as the stereo, or connected to the stereo are most important.
The effect of treating the data cables is to remove distortion in the stereo system, particularly in the high frequencies. Unlike treating the power system directly, which seems to work upwards from the fundamental bass tones.
Until today, I sometimes thought that my recent STB treatments were gradually approaching the point of diminishing returns. Still improving, but needing more (or stronger) STB for each improvement. Periodically I get that feeling. But then suddenly, something causes a quantum leap. That happened today, and it's jaw dropping, mind boggling, etc. I assume it is the 3 new sheets, but I also covered a lot of data cables with Nuclear STB. Just internet patch cables, unrelated to the stereo.
And I also completely covered the unused AC wall outlets near the stereo, each with a large sheet of Nuclear STB. Previously only a few strips of Platinum were stuck on them.