I put a golden plate, not on the central electrical panel of my house in the basement, I had already 5 G.P. there, no, this time, I put it on an electrical breaker panel in the second floor of my house near my audio room... I had only lava beads on this panel already, adding the golden plate makes a big difference...
I accidentally forget today to connect 2 USB Schumann Generator, and the sound was slightly more compressed, I connect them anew and bingo! the imaging was there like never...
This 10 dollars S.G. works marvellously and at around 80 bucks for all the 7 ( I dont count the BLACK UFEEL one at 50 bucks) I dont know if the top Hi-Fi audiophile Acoustic Revive one will be able to replace them all... I dont think so for the simple reason that their range of action all around me at different height variation is better than only one, even more precise and powerful... The Black UFEEL is precise tough and in the critical spot seating on my screen computer that makes a big difference...The Acoustic revive S.G. is way too big to be located there...
But the difference in cost is so much I dont ever think about that one...And they work audibly well indeed located around my listening position in my small audio room...Then for me it is the deal...Cheap to replace also...
And believe it or not I use one of them near my bed and my sleep has never been better for the last 3 months...