When is it time to consider adding a SUT?

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.

I passed the ball to you with my very open ended and reasonable questions.   There are no trick questions or traps in them.  You are free to answer them or not, and you are free to state any assumptions you wish in your reply.  I do not intend to engage further without the courtesy of your open answers. 

Two words come to mind: distance and irritation