There are many things to create a more 3 dimensional stage. I think it would be a good thing to mention in an article how to make it more 3D.
At the end you Always will lsiten to all different parts togheter including the acoustic of your room.
An amp with a poor 3D image will not give a huge stage when you will change the reflections of your room.
I have been several times in room with many bass traps ( they spend a lot of money on it) and still have a poor sound.
The brands I did mention I sold for many years and compared to others to know whether it is 2 or 3 dimensional.
At the end you Always will lsiten to all different parts togheter including the acoustic of your room.
An amp with a poor 3D image will not give a huge stage when you will change the reflections of your room.
I have been several times in room with many bass traps ( they spend a lot of money on it) and still have a poor sound.
The brands I did mention I sold for many years and compared to others to know whether it is 2 or 3 dimensional.