Better sound at night?

[BoyScout]

For years I tried to found out why I prefer music at night, I assumed it's light or the background noise around me. At some point I built dedicate music room in my office, it was my way to getaway and relax , but even there I preferred listening at night time. I approached Applied Physic faculty in the local university and convinced them to run a small research for me, they form a small group of scientists that talked/argued  and took some measurements  ... it wasn't official but it was serious. One of the conclusion was the importance of grounding and they suggested I'll install my own grounding system which I did...
I wrote about it in the power cable topic

I don't have an opinion about power cords for the devialet but I can report that a separate ground did wonders for me.
I built thick copper mesh, about 1m square and buried it more than a meter into the ground ,in addition I used 2 solid copper ground rods going additional 15 meter into the ground. I also. connect it to water line. All joints are crimped and welded. In addition I keep the ground moist ( irrigation) For me it's by far the best tweak I ever found. I do it for years now, ( every time I move apartment or house) and I always amazed of the positive deference. I know it's not easy tweak , specially in apartment with neighbors

I think i´ve conditions to do something like that. Doesn´t seems very complicated, considering i´ve the lawn just over there.
The idea is to link the system´s sockets ground cable to another one, thicker, and connect it to a buried copper base (and if possible to a water line too).
Am i missing something?