I have a stereo setup in my family room. The room is 14 but 20 feet. I have two sets of speakers one is a bright pair of bookshelf speakers and the other is a warm sounding pair of floor speakers. There are wall mounted shelves going across one of the short walls, the bookshelf speakers are on these shelves about six inches from the rear wall near the corners of the room, about five feet high. The floor speakers are on the floor in the same position but about a foot from the rear wall. Should I be only using one set of speakers or is there a way I can make both sound better when using them together.