I think that this discussion is more than interesting....And useful....It is a change from tastes conditioning discussions and unconscious or conscious marketing electronic components habits by all of us, and from usual audiophile not so always useful other discussions...
I am interested by basic fundamental ways to upgrade any audio system to his peak potentials by homemade solutions at low costs...I know that this is not only possible by my own experience and experiments but this is the only way to Hi-Fi for most of us...
Almost all audiophile communities lives in the fog and illusive faith that all major upgrades are linked to the purchase of a costly new electronic components; a trip around all forums thread is proof of that affirmation...
My own experiments reveal to me that it is false and an illusion...They are 3 levels of quality for electronic components : low-mid-high...( sometimes many thousand dollars distinguish and separate some element from some others for example in the mid rung)
On each rung of this scale any upgrade on the same rung is an illusion in the sense of being a small changes rarely a great one compared to possible changes in the three embeddings...
The greatest upgrades in audio are controls of the 3 embeddings: mechanical, acoustical, and electrical grid...
The methods to controls these 3 embeddings can transform almost any mid system on the scale in a high one system, and if not, very near the high ones....( and transform a low one to a mid level one)
Then your experiments are great contribution about that goal to upgrade by controls of these embeddings....Not listening to that will be great lost for all....And coming back to usual small talks or advertisement for the products we all cherished inspired by our tastes and limited experiences( How can we decide what will be the absolute best electronic components? )
But most people are in the faith conditioned by the industry : only way to elevate a system is to change your electronic components, these same components that are most of the times already good, but unbeknownst to the owner, not at their peak potential S.Q. level because of defects in the controls of the 3 embeddings or in one or 2 of them...The most powerful and important being the acoustical, the electrical, on par with one other, and in third the mechanical aspect...
I think that it is easy, low cost, and possible to takes our audio journey in our own hand if we know the right direction to takes...Not so many threads pointed to the right direction, freeing ourselves of the buying illusion and frenetic abdication of our own creative thinking process....
I want you to go on with your discoveries and opinions, ignoring the negative ordinary voices...