When is it time to consider adding a SUT?

Raul,

Answering my questions with your own questions is a polemic exercise.  If we are to have a meaningful conversation this is not the way to start.  I provided a frame of reference that offers a clear starting point.  Please answer my questions.

Dear @billstevenson : For to persons can have a dialogue in a subject the first premise is that both understand the subject under dialogue/discussion. That's why I posted:

"""   before that is important that you and me talk in the same " audio language ".  """

It's useles that you, me or any one give answers or make questions when one gentleman is talking of " oranges " and the other of " airplanes ".

So,  from your point of view which targets are the main ones in a phono stage .? what are we looking for in a phono stage?

You can be sure I have answers to your questions, no doubt about. 

Regards and enjoy the MUSIC not DISTORTIONS,
R.

Raul,

Since English seems to be a secondary language to you, perhaps you do not understand my point.  If that is so, please look up the word "polemic" and you will at least understand my objection to your approach.  If you already do understand my point, then you will need to seek out a different person to parry with.

Bill

Dear @billstevenson : Parry? to you?. Why should I?

My point is easy: to have a dialogue where you and me speak about " oranges " and only want to be sure about.

All of us have some misunderstood audio subjects because audio is so wider whole subject. Here we are talking of phono stage and I need to know the main targets in a phono stage from you and that's all.

If you refuse to do it could be because: you really don't want my answers on your questions or you are not to sure on my specific question or just you don't want to do it.

The " ball " is in your " field ". Shall we play?

R.