Optical cables are a must-have for any audio enthusiasts. Constructed of a High-Purity optical grade fiber, it offers an excellent signal transmission. The manufacturing process employs a sophisticated lens-polishing to make the clearest end possible. Micro convex ends are added to highly focus the beam of light. These techniques result in minimal error even with a highly distorted signal. Toslink cables are immune to Electromagnetic Interference and Radio Frequency Interference which are common to standard Audio/Video cables.