I just moved into a new home that has speaker jacks set up in the walls both in the living room and bed room. I can not seem to figure out how this guy set the speakers up. I have my stereo in the living room, so for me to to use the jacks up stairs I need to set it up for an A/B speaker set up. My question to sum all this up, Is how important for music is it that I use left and right speaker set up? Will there be different sounds coming out of the left and right speakers at different times? I know nothing about setting up the speakers. Please help out a "know nothing"