The S.G. are linked to this room grid.... They are like an ice breaker in a crystallised sea they break the ice of the general noise floor of the house...The information is then better between component..... This is my explanation but I am not a scientist by the way... They also change the pressurized atmosphere of the room like the ionizers do....
Put a piece of my "golden plate" on top of your S.G.....You will change the quality of the sound.... this will prove to you that this is NOT a "subjective" vodoo effect mainly....All is not vodoo or placebo....Superstition of misplaced concepts is not science...
"Golden plates" : Shungite thin plate for phone+ copper tape on the external side, if necessary add a tiny Herkimer diamond for balancing clarity.... I own 12 cheap S.G. in a cable synchonized connected grid....
It is one of my room tuner controlling grids....
The acoustic of a room is not described completely if described only by bouncing waves all along passive walls... Any room must be activated and i use also ionizers for that but also a grid of various resonators, tiny and bigger, but mainly 18 Helmholtz tubes and pipes that COMPLETELY transform my audio system and room ...
An ACTIVATED room is a room where the distribution and location of heteregenuous pressuring engines(H.T and P.) rectify completely the sound pressures levels, the relation between frequencies waves coming from the speakers and the walls at the rate of near one hundred back and forth in one second in any small room... Picture the atmosphere of your room like a very tight set of strings on a violin.....The H. room tuner grid act like a a slight touch on a set of springs or on the " strings " of incoming sets of waves, producing a tuned vibration ....
Helmholtz is the creator of room acoustic after Greek and Roman and probably Chinese before them....😁
Being audiophile is not buying gear or upgrading anything.... It is knowing how to install the gear in his 3 working dimensions, which i called embeddings of the audio system...
The acoustical embeddings by itself is more powerful than almost any upgrade of electronical design....
Imagine the 3 together....