Mahgister, can you show us a picture of your mechanical equalizer? I am not sure what you mean by "tight pressure zone" comparing it to strings on a violin. Maybe you mean tight tension?
There exist no photography of pressure zones in a room only diagram...
Pick any acoustical article they will show you ...
anyway thanks for your interest....
Any room is not only walls waiting from the waves to bounce back and beign reflected, absorbed or diffused...
Any room is when sound come from the speaker a multiple pressure zones created by the meeting of waves and their resonance...
I say that these pressure zone are tight like strings of a violin because of the speed of sound the waves croos my room near 80 times in one second...
The brain decision threshold treat the incoming frontwaves is 80 millisecond if i remember well...
Then i compared the new pressure zones introduced by 32 fine tuned tubes and pipes to a a violin string optimally tight for producing the right tone....i use my equalizer to modify the equilibrium between the distributed pressure zones and the ratio between the timing of direct and reflected waves...
The metaphor comes from the fact that before my ears qualify the sound quality, the waves had cross my room and ears a great number of times...
A slight modification like the fleeting of a tight string produce a note...A SINGLE STRAW constituting the neck of only one of my 32 tubes or pipes of few inches could destruct completely the sound timbre, or modify radically the soundstage or the listener envelopment.... A single straw has more qualitative audible effect than some upgrade in gear...
That illustrate how powerful acoustical settings are...
They are more details in my thread....
Thanks for your interest....