It is this knowledge that Ortofon many years later - in 1980 – used when the company started to work with different metals’ sound in the internal threads of cartridges.
Through the 1980s, Ortofon expanded the experiments with different alloys, and achieved an unprecedented sound quality. In the late 1980s, Ortofon founded its Japanese subsidiary and obtained access to a more than 1000 years of tradition and know-how. The head of the newly formed subsidiary, had believed that the metal’s purity had an impact on the sound that was transported through the coils of cartridges. Amongst others, Ortofon founded a cooperation with Dowa Mining, who was known for making ultra-pure copper (99.999999%), and PCOCC (Pure Crystal Ohno Continuous Casting) copper developed by Dr. Ohno from Chiba Institute of Technology. This unique molding process forms the copper crystals continuously without ruptures of any kind.
The positive experiences with replacing the coil threads in the cartridges with ultrapure metals gave new inspiration, and the thoughts turned to interconnect and speaker cables that are longer than the 3 cm thread typically used in a MC cartridge.