From the Manufacturer

Achieve Higher Quality Digital Audio with M Series® Technologies
Not all fiber optic interconnects are created equal. Many lack the materials and construction necessary for optimum signal transfer and audio reproduction. Worse, they can induce the time-domain error known as digital jitter, causing the signal to be inaccurately converted from digital to analog for output to your loudspeakers. Jitter is often a consequence of low-grade fiber and unpolished fiber terminations, which increase internal light reflections within the cable and light dissipation at the point of connection. The result: audible imperfections, such as phase distortion, higher noise floor, and compressed soundstage.

Experience a New Level of Digital Audio Clarity and Accuracy
M850DFO Digital Fiber Optic is in an elite class with audiophile features you won’t find on other optical cables. Low-loss graded-index fiber minimizes attenuation for higher bandwidth and more accurate bitstream transfer. Monster also precision polishes its fiber terminations to ensure optimum signal transfer without light reflections, bit-error and audio smearing. You’ll hear more detail, more depth in your digital music and movie soundtracks, feel more immersed in the experience when the digital signal is accurately transferred to your surround sound or stereo receiver.

Exclusive Monster Connector for Higher Performance Sound
Optical connections require precise alignment for maximum signal transfer. Unfortunately, many fiber optic connectors provide a loose, flimsy connection sometimes creating a gap between the cable’s fiber termination and the AV receiver’s optical lens. The result: lightwave contamination, light dissipation and signal loss. M850DFO features advanced spring-loaded connectors, ensuring an optimum mate between the cable fiber and optical connection, between source and sink. M850DFO Fiber Optic is your assurance of a truly high-performance optical audio connection.