Monster THX I100 FO-4 RS Standard THX-Certified Digital Fiber Optic Interconnect Cable Radio Shack (4 feet) (Discontinued by Manufacturer) Allows enjoyment of movies with Dolby Digital and DTS surround sound Precision-polished fiber optic connector for maximum signal transfer accuracy and lower internal reflection Specially optimized low-loss optical fiber for higher fidelity Meets minimum THX certification standards for proper system performance, reliability and ease of installation