i experimented myself with many "tweaks" with success..
Schuman generator modified grid... Ionizers... my "golden plates" etc...
But in my audio experience with these "tweaks" so good they could be, and some are, NOTHING compare to acoustic control of the room and the tuning of the room.. I just created a thread about acoustic... No reactions 😁😊 ... People like what they can see, and touch, especially any shining object like speakers, dac or amplifiers... 😁😊 acoustic devices dont have sex appeal...
i say that because those who mock all "tweaks" users and experimenters, are the most DELUDED consumers there is and ever will be...
They think that most of the sound level quality they listen to come from the gear FIRST AND LAST...
Sorry but acoustic science say the opposite: sound quality mainly come from the SPEAKERS/EARS/room relation FIRST AND LAST... The gear quality and those tweaks are in between this FIRST and this LAST... Acoustic rule...
Then before upgrading know how to control electrical noise floor of the house, control vibration, and control acoustic...
Anything else is consumerism ignorance ...
And before mocking a "tweak", TRY TO replicate it yourself and experiment..
All my knowledge in audio is small yes, but consist of evidences for me coming from years of experiments with no cost products and no buying of any upgrade...
Mainly coming from basic acoustic...Helmholtz know better already about sound than most anyway even BEFORE EDISON invented the phonograph in America or Charles cros in France.... ( Edison invented less than what we think by the way)
And the Greek architect know more about acoustic and the Egyptian priest than the average audio consumer or reviewer...Egytian Priest were using Helmholtz resonators before Helmholtz to increase their control of acoustic for temple cremonial magic...