68pete,
I just tried 6 of the MC-05’s in my PS Audio P10 for a day. I still have 3 at the wall outlet. The sound again got a little louder but more up front. In comparison to having those six added at the wall that resulted in the sound stage going back again. Which is correct? I don’t know. The video may make the difference. I’m going to try again while viewing my 85" UHD Samsung.
A thing I noticed. Once you move the MC-05’s it may take several hours to get the full result. To play it safe, I’ll’ give them 24 hours at each location.
tbg, mentioned about vibration control with the MC-05’s. I may try adding some teflon tape (plumbers tape) around the MC-05’s to see if that has any affect.