The most stunning thing i ever experienced in audio, is the huge modification induced by the room materials composition not only the walls, floors, cellings composition, but the furniture... And the geometry and topology of the room...
More than that i was flabbergasted by the effect of small resonators made of cheap materials had on my sound experience... I created 100 of them... I call them "mechanical room equaliser"
Acoustics control dwarf choice between cables or between dac and amplifier... The only exception will be going from a very bad piece of gear to a top one...
All matter when we create an audio system , even cables... But nothing compare to acoustic analog control...
i dont own a digital room control ( save my modest equalizer now) or which will be the ideal tool and gear : the BACCH system for sure...
Why did i know if this system is so astounding if i did not even never listen to one ?
i studied acoustics...
I know what are the spatial aspects of sound and how to control them in my room... But an analog system as mine was is not ideal even if it is spectacular... It is not refined the way the BACCH system is...( my mechanical system dont adress for example HRTF measures)
It is the only upgrade worth of my money...
I am happy and dont think about buying one now , my budget is very thin...
Ok i shut my mouth...