This is a very interesting thread, and in fact, this thread hind a big question mark for us all. It is the pre we ask for.
For example, Audio research Ref 5se, some one try to swap it out and some one call it world class pre. So who is right? What content inside the pre? What we ask for the pre?
I am here to send my 2 cents:
There are 2 most important fact of the pre. Go small or go large!
Go small, means go detail
There are a lot of sparkles on the recordings, with right pre you can hear very clearly, with another one, you almost can NOT hear it. Some one value this point,
I am the one who value small, you can call small sound.
Go Large, meaning very big 3D imagine, very spacious,
The sound is very open, and sound becomes big.
The new one might be surprised and call it is the one who ask.
Audio Research Ref 5 se is go large definitely.
Does the pre can go small and go large both????
Seldom!!!!!
So who is who? Different people emphasis on different things.
They both right, they are searching the different kinds of things.
From this point of view, you will not convince the other people to choose what you choose.
People are just different.