I was looking at using these in ceiling speakers for rear surrounds. I am currently running a 5.1 system: Marantz sr5003 receiver Def Tech Mythos 2 left and right Def Tech Mythos 3 center. My question is it looks like these are set up for bi-polar wiring if I am looking at them correctly. However, I only have dual 12ga wire running to where the speakers will be located. Will they function properly with only the 2 wire hookup? By the way have to go in ceiling per wifey's orders. Better than nothing. Thanks Mike