AudioQuest Pearl Series 1.5 Meter (5 Feet) Digital Optical Cable The audio frontier is all abuzz these days with the pleasure possible though HDMI, USB, FireWire and Ethernet connections However, these current generation digital technologies are only part of the story, just as the challenge of designing, manufacturing and choosing the best analog interconnects and speaker cables is as important as ever The less dispersion in the fiber, the less distortion in the final analog audio signal presented to our ears The fiber is a relatively huge 1.0mm in diameter, and the LED light source is also relatively large, spraying light into the fiber at many different angles Because each fiber is limited as to what angle of input can enter the fiber, there is far less variety, and far less dispersion over time