I have TAD CE1tx speakers with Audio Sensibility OCC (Ohno continuous cast) copper cables that are close to being single crystals of copper.
In contrast to OCC copper, OFC (oxygen free copper) has 50 crystals/meter with and average crystal size of 0.02 meters. OCC copper has 0.008 crystals/meter with an average crystal size of 125 meters.
OCC copper is the purest form of copper on the planet and used in many high-end cables.

