A lot of DVDP's don't have the optical SPDIF, but have the coax. My sony DVDP only has coax.
My receiver has a COAX in and a COAX out what would the coax out plug into? I mean you already have better than TV sound, then hy would you want TV sound, or worse sound from the projector if that's what is for?
One shall stand... One Shall Fall... - Optimus Prime