I performed more tests over the weekend and was prepared to make an extension with a spare hubbel outlet i had.
Found i did not have any spare outlet housings and swapped my other T-adaptor in a long shot.
What i found was that there was an unexpexcted difference between 2 identical T-adaptors. The one i previously used for testing sounded as if the volume was down 2 notches or so. The other T-adaptor immediatedly sounded louder. I was not anticipating any diffeence.
I am puzzled, but very happy now with the 4 Purons deployed and work very much exceeding my expectations that i have no desire to some more energy to swap better outlets.
I do, however stall find it will make a difference, i.e the different quality of oulets where the puron in inserted, together having a difference in sound, even with or without the T-adaptors.
Applied some Carbon contact enhancer to 1 puron and noted an immediate difference.