The Prodac Pro Digital is another coaxial design digital cable. A single ultra cast oxygen free copper conductor is used to carry the signal. Ultra cast copper is specially treated and contributes to the exceptionally natural tonal signature of the Prodac. The dielectric is gas foamed polyethylene and the shield/return is of a unique multi-material construction that is extremely effective at reducing high frequency interference. This is the first time Chord has used a composite shield, but it certainly won't be the last.