I moved into a home with pre-wired speakers. There is a bundle of speaker wire coming out of the wall. Each wire has 4 colors of other wire coming out of it. There are a total of 7 main wires (with four wires each) and a total of 9 speakers.
i had a cable like that, 4 wire but two clamps on speaker. what i did was have the red and black wire.. and then just connect another wire to that, making sure you connect the same wire on both ends.. eg: red with green and black with blue... color varies.. but you get the point..
4 conductor wire has a few neat uses. 1 is to bi-wire your speakers. Meaning that if the speaker has 2 red and 2 black terminals then remove the bridge and run the cables to the posts separately thus increasing surface conduction and increasing output and sound quality. Also if you are running cables in the wall to 2 speakers that are near each other or to a single stereo speaker then you don't have to run 2 separate 2-conductor wires. This would also be true if you are running to a second zone using an in wall volume control. If this is the only wire you have for a standard speaker connection it won't hurt to twist them together at both end (pos with pos/ neg with neg) and serves the same purpose as using thicker cables.
