I have a Pioneer Elite 520HD TV that works swell...the cable from the wall goes through a splitter, and then one side goes into antenna A, and the other goes into my cable box, then my TIVO player, and then into the TV antenna B connector. All works as advertised except I get a great "stereo" signal through my TV from A (that is, straight from the wall through the splitter), but not through B (that is, through the cable box and TIVO player). The sound quality is markedly worse on B vs. A. I've tried switching the A and B cables, and it just reverses the problem, if that makes any sense.
Any brilliant thoughts? Antenna A and B are set up identically (via the setup program of the TV)