The Reference Diamond is equal to its siblings with the exception of the thickness: 2.9 mm  for the interconnect. It has a solid silver-gold core, helically wound in two thin layers of Kapton insulation, covered in a silver screen and a transparent Teflon jacket. The extra thick solid core used, provide the extremely low micro-distortion. Due to the minute influence the cable has on the audio signal, the result is a very relaxed, stress-free and natural sound. The construction does not only look attractive, it also gives optimum electrical behavior and close to perfect shielding. Despite being thicker, the Reference Diamond cable is is flexible, elegant and and easy to work with. The proprietary silver/gold alloy has the lowest micro-distortion in its price. Every Crystal Cable comes with a laser engraved serial number and a certificate of authenticity.