Baylinor is right!
as i said, i am in retirement and it takes me 2 year full time to figure out everything needed..
But trust me my system (low cost) was audiophile (spatial characteristics of sound were incredible all sound around my listening position, speakers dont exist anymore) ...
It could have been improved for sure with high end components, but after my optimization of my low cost system i was already in heaven, it was enough for my needs and budget...
With the same knowledge i can now optimize any system at any price anyway...
I did it a second time with a smaller system ( way less spectacular because desktop speakers cannot replace full and big speakers)
I had used my acoustics knowledge to optimize my headphone also and i own now one of the best headphone in the world (soundfield natural and out of my head)
Acoustics rules....
Someone saying otherwise is ignorant...
It’s a lot more complicated than upgrading components. That’s why the majority do without.