Pearl, the audio frontier, is all abuzz these days with the pleasure possible though HDMI USB FireWire and Ethernet connections. S/P-DIF is transmitted through digital coax and TOSLINK fiber optics (EIA-J) making them still some of the most important cables in electronic entertainment. Highlights 19 narrow-aperture synthetic fibers low-jitter (digital timing errors), precision polished fiber ends. TOSLINK connectors are common on cable-boxes TV sets. For these many reasons AudioQuest has refined and renewed their line of serious high performance OptiLink cables. All models and all lengths are now available TOSLINK to TOSLINK and TOSLINK to 3.5-millimeter mini optical. If the light source were a coherent laser firing into a vacuum all the light would stay straight arriving at its destination at the same time. Even if the LED light source in a TOSLINK system were coherent the light entering a fiber-optic cable is scattered and dispersed by imperfections and impurities in the fiber.