As I recall, after researching this type of phono stage, I came to the conclusion that there is an internal theoretical contradiction. That is, for ideal transfer of current you would want zero impedance at the input of the phono stage. But in fact you have to have at least some impedance in the form of a resistance between the grid and the ground or cathode of a tube or between the gate and the ground or drain (or collector) of a transistor, or else those devices don’t work. So in operation, they all present at least a two or three ohm parallel resistance at the input. The proof of the pudding would be in the listening.
jwp, Why do you say that the Sutherland is “superior”. What is it superior to, and what makes it superior?
jwp, Why do you say that the Sutherland is “superior”. What is it superior to, and what makes it superior?