I recently bought an RCA receiver with 5.1 surround sound. I have a blu ray player, HDTV, Xbox, and a wii. I just have everything hooked to the surround sound with RCA cables (red white). It seems like when I watch movies that the voices of people are really quiet and the explosions are super loud. I have never used the opitcal fiber plugs in a surround sound, but have the option with my blu ray player and new receiver. Is this the best way to get the full affect of my surround sound? Do I need to get a fiber cable? thank you for any help