No EQ can replace ears tuning+ physical acoustics... EQ is a tool not the main tool...
someone who know among others say this :
«The problem with digital room correction is that it only addresses the frequency domain. Depending on the room, it may do a rather good job.
However, if your room is causing a 30 dB cut at 100 Hz, these digital systems won’t be able to fix this. Most of them can only boost the signal by something like 6 dB, which isn’t enough to cover the 30 dB lost by your room acoustics.
As far as the time domain goes, I think it’s obvious to note that no amount of EQ will fix this problem.
I’ve used both acoustic treatment and the IK Multimedia ARC system. My findings? I heard an immediate difference as soon as I put up some acoustic foam to the left and right of my loudspeakers. The sound was instantly tighter and more defined. With ARC, there was a difference, but it wasn’t as dramatic.
The goal of this article is not to sway you from digital correction products. They can be a valuable tool in helping create an accurate mixing environment. I love the JBL LSR monitors. They sound amazing, even without any room correction.
Digital room correction, when added to acoustic treatment, can be very effective. However, nothing…I repeat nothing…can replace the need for acoustic treatment.»
https://www.prosoundweb.com/in-the-studio-acoustic-treatment-vs-digital-room-correction/
I tuned my last room a dedicated one with a distributed array of 100 Helmholtz resonators mechanically tuned... I used many other devices ... All homemade ...
I call this a mechanical equalizer because i worked with some large band frequencies not precise frequencies... I use a compensation and balance effect by the numbers of resonators, their location and distribution and tuning ...
Saying that we cannot trust our ears say a lot about the people saying it more than about acoustics ... I disagree... My room was not PERFECT, but optimal for my ears structure and filters and ASTOUNDING with immersiveness at no cost because homemade ( not esthetical for sure) 😊...
I had not the wallet for paying 100,000 bucks which is the minimal cost of a tuned acoustic room ...
Thinking that some electronic EQ will replace acoustic and psycho-acoustics knowledge is preposterous for me..
Now guess why all acousticians use their ears?
This is due to the room not the speaker and this is what is screwing up the image. You can mess around with acoustic treatments until the cows come home and you are not going to get these speakers within 1 dB of each other without turning the room into an anechoic chamber. Digital EQ is the only way you are going to conquer this. Next time I go over I am going to bring a digital preamp to show him what happens when you make these adjustments. I find it interesting that very few "audiophiles" have ever measured their system. They want to do it by ear. Right.