I have a basement with what appears to be surround-sound infrastructure. At 4 points in the ceiling (let's call them locations C0...C3), there are a pair of speaker wires. At one location near the floor (call it point F), there are two pairs of speaker wires (probably where the audio controller was located). Nearby there is also a coax cable exiting the wall.
I used a multimeter to test the resistance between the wires at point F and points C0...C3 and each time it reads infinite, suggesting that the wires are not actually connected. However, before I moved in, I definitely noticed that the previous owners had speakers in their ceiling.
I don't know anything about home theatre systems, so what are the possible explanations? Is there some kind of variable-resistance component hiding somewhere in the walls (perhaps some kind of junction that only conducts in the presence of a signal? There are 4 pairs of output wires for only 2 pairs of input wires, after all)? Could they have somehow disconnected the wires upon moving out and, if so, how and why?