DS Audio PH-001 Phono kabler"The best phono cable for the optical cartridges" The highest quality construction throughout When using an MM or MC cartridge, the cold side of the phono cable serves only as a ground. In the case of optical cartridges, however, the cold side supplies power from the equalizer to the cartridge. Therefore, in such an application, the cold side of the cable is just as important as the hot side. The PH 001 features identical materials and construction on