I've just recommended this on another forum and two non-believers gave me these replies: "pray tell me how does it do that? You can only do it with a stereo cartridge with 4 coils, and you need individual access to each of them. One can't wire the stereo signal back to mono to cancel out vertical modulation." "The only thing you do with this , is creating an exact same signal on both channels. Your do not cancel out vertical modulation. Besides of that you stack the coils which creates an other impedance, and then separate that impedance to a double input.... mismatch guaranteed i.m.o." Of course, these replies are based on assumptions and not real-life experience. But since I don't go very deep into the technical aspects of this, I'd like to know what would be a good answer to these comments. Thank you!