Grado has combined newly developed coil winding techniques with decades-old disciplines. All of the internal magnetic circuit parts are Swiss screw machined or molded metal, which have tolerances on the order of the best Swiss-made watches. A new four-step shielding process brings not only exact unison between the four coils but an unobstructed path for the cleanest signal in any phono cartridge. This creates precise balance between channels and accurate stereo imaging. The Epoch3 is wound with the finest properly sized and annealed 24-karat solid gold wire, which is the ultimate conductor for the transmission of the music from your record.