If you use a fiber optic cable as part of your audio system, the sound quality of all the channels in your system depend on this cable to deliver clear sound. Abt offers a great selection of Digital Optical Cables from AudioQuest that will give you the sound you've been seeking. A digital optical cable is a great solution for your home entertainment needs. It has superior quality over analog and does not suffer from electrical interference. Granted the HDMI is the superior audio/video cable, a digital optical cable benefits those with older receivers get the best quality possible.