Monster THXI100-FO4NF THX Certified Toslink Fiber Optic Audio Cable-4 feet Meets minimum THX certification standards for proper system performance, reliability and ease of installation. Specially optimized low-loss optical fiber for higher fidelity. Precision-polished fiber optic connector for maximum signal transfer accuracy and lower internal reflection. Allows enjoyment of movies with Dolby Digital and DTS surround sound. Specially Optimized Low-Loss Optical Fiber For Higher Fidelity