OPTILINK-A DIGITAL INTE RCONNE CT: TOSLINK F i n e ly P o lis h e d L o w D is t o r t io n Polymer Fiber -2. 0dB/meter Synthetic Polymer Conductor Black PVC Black with Black Striped PVC Jacket Brass Ferrule When using a Toslink (EIA-J) fiber optic cable, it is the "one" most important audio cable in your system. The sound quality of all the channels, whether two or five or more, are dependent on this one cable to deliver an undistorted, smooth, clear and dynamic performance. The thoroughly engineered synthetic fiber in AudioQuest’s OptiLink-A minimizes signal loss and jitter (time based distortion). The plug’s brass ferrule also contributes to ideal light transmission and the highest quality sound at a reasonable price.