Clean those conduit boxes.

I've lived in my apartment for many years. My walls are made of plaster. When I installed my audio grade receptacles in the wall, years ago, I simply put them in, checked polarity and went on my way. Since upgrading to the furutech gtx-d recently, (which is going through burn in hell, see my other thread) I decided to go back into the two metal conduit boxes that feed my system. I made made everything "perfect" and vacuumed the plaster debris that had been in the boxes for god knows how long. Maybe as long as the building has been standing- maybe 50 years. Each box for whatever reason, had a couple of ounces of plaster in it, ranging from pebbles to plaster sand.

Now it sounds actually cleaner, with more micro detail. Not a huge difference, but still a worthwhile improvement. Not sure if the pebbles and sand that were in the box were resonating or what. Could even be placebo- but it certainly gave no benefit being there. So it's gone, and it's one less thing to ponder. Just wanted to share. It could actually be detrimental to the sound if you have junk in the boxes, like I did. Makes sense to make everything as "right" as possible.