It works very well with older cdps prone to high frequency distortions - the wiry and gritty sound of the 80's and 90's. It is defimitely not a gimmick.
It has little or no effect (in my system)with modern, high quality cdps (which don't need correction anyway).
It has little or no effect (in my system)with modern, high quality cdps (which don't need correction anyway).