The math required is high school algebra. The concepts are a bit more difficult to grasp, but one really need not grasp them exactly, if one grasps the math relationships.
The results are "unpredictable" only in the sense that mating any two disparate audio components with a human is unpredictable.
And believe me, I am no EE. I think the manufacturers are to blame for the confusion surrounding SUT use, because there apparently is no agreed upon standard for how to describe what the SUT does electrically. Some talk in terms of db, some in terms of ohms, few in terms of turns ratio. The latter however is most important.
The results are "unpredictable" only in the sense that mating any two disparate audio components with a human is unpredictable.
And believe me, I am no EE. I think the manufacturers are to blame for the confusion surrounding SUT use, because there apparently is no agreed upon standard for how to describe what the SUT does electrically. Some talk in terms of db, some in terms of ohms, few in terms of turns ratio. The latter however is most important.