Removing masking noise via improving acoustics is the most critical thing a person can do to improve the observed sound quality of an audio system.
And that requires research, lots of research and work and thoughtful application to the specific case at hand - as acoustics is not a simple problem. Otherwise we’d all have it down to a fine science and all be observing it’s correct effective use in our own systems. Note that we are not.
My own solution work for me:
Passive material treatment with a balance between reflection and diffusion and absorption...
But the Activation of the zone pressures of my room by adding a grid of Helmholtz homemade resonators, which i called a mechanical equalizer gives me the real improvement ( located at some critical ponts in my room )....Tuned by ears with a method to "mark out" the first frontwaves coming from each speaker for each ears....
For vibrations controls of my speakers i use a sandwih of different materials under my speakers.... But it is not enough, i added a 4 springs sets under the speakers, and i added 4 others springs boxes under a fine tuned load on top of my speakers.... This worked at peanits costs...
For my electrical noise floor i used a edevice i created the "golden plate" a piece of shungite +copper tape on external side.... I have them all along my electrical grid...
The results make my ratio S.Q./price very interestesting.... My 500 bucks system is not better than many system here but i am not so far behind them.... People would be astonished....
My best and regards...
