I'm using a 50' "Digital Coax" cable to hook my audio interface to my home theater receiver. The cable is a brand new Monoprice 75 ohm cable. I'm just kind of wondering how (for lack of a better word) robust S/PDIF over coax at 50' would be. if I mess with the cable some of the receiver side, the audio will momentarily drop out and come right back. But I'm not seeing a pattern. It almost seems like the jack on the receiver might be bad, not the cable. It does the same thing on both of my coax inputs. I do not hear the pops on my studio monitors, just the home theater speakers over the S/PDIF connection.