Miracles in Audio, by luck, by good choices,by design or by tweaking...

I would say what your wife thinks is much more important than what anyone else thinks. I applaud your passion for good sound and your very interesting experiments. 

My deepest salutation my friend...

My experiments comes only from my desesperation because I cannot afford Hi-fi sound...I would have tried anything that I can try... I read much, and try simple things... Isolating from vibrations, room treatment organized by many sessions of ears listening then this was not optimal but way better than the nude room. I tried stones and crystals after reading many other guys that tried it like Geoffkait first...Except that by reading more I discover some costly invention that inspire me, to try more, I go from Machina Dynamica loose peebles idea, to acoustic revive products, to Stein harmonizer idea etc in this increasing complexity order with the use of crystals...Inspired by that I try my homemade grid of stones cabled and battery powered, a small improvement after another each time...The Helmholtz bottles and Shumann generator modified and linked to my stones grid are the last but not the least useful tweaks ….

I dont like the word "tweaks" because it seems to evoke a secondary means to improve the sound... But for me " tweaks" are primary and mandatory means to gain Hi-fi, more than the wiseful choice of an amplifier... You can easily choose any " relatively good" amplifier, but if you install it in a location that is not controlled, cleaned, and protected, you will not listening to it at his optimal level at all... Then at the end obtaining HI-FI is not possible only because you are buying an adequate amplifier for example, but are way more linked to the means which you used to embed it in your audio grid....That is what I learned … I learn also that homemade solutions cost not much money....That six 10 bucks S.G. modified are equal or better than only one acoustic Revive S.G. for 600 hundred bucks,because if only that, you can install them at 6 different location in your audio room and reinforce the effect...Etc...You can modify a 10 bucks toy and play with it without fear, but who mods a 600 hundred dollars toy risking destroying his value? When you buy a 600 dollars S.G. you do not think first that it will be better to put stones near it on top of it and cabling it etc...You think instead  that it is the better the money can buy and touch it no more after  installing it somewhere... :) 

I must say now that without this simple idea of the Geoffkait peebles that I read about some years ago, i would always be in my first steps without having all the ideas that comes to me after that... It was like an inspiration and and incitation to experiment with that... This is the reason for which I respect his ideas, not only because he is articulate and knowledgeable...But it is not proof by any means that all he say is right for sure, but he is not often stupid if I can say... :)

Some guy here for the first times experimented with shungite and tourmaline on top of the central electrical panel of his house and notice an objective audible positive change.. I recommend also for others that dont have this possibility because they rent a room to try with the conditioner or the wall wart or power strip  .... He wrote privately, I hope that he will wrote himself his testimony here publicly in this thread for the benefit of all... : )