This cable should work fine for any OPTICAL audio connection. The black plastic adaptors are for use ONLY with mini-optical port connection at one or both ends as needed only. I had no need for them so I just let them hang. There are, however, very small (1/4 inch) clear plastic covers over each end to protect the optical fiber ends. These MUST be removed before use. It sounds like at least one other reviewer did not remove these. Once I set my cable box to Dolby and my new TV to output bitstream audio and turned my receiver optical input ON, I got great sound with this cable. I did not need all 6 feet, but the cable coils like a spring to take up the slack, a very nice bonus!
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