I don't know how a processor could create silent sound waves from speakers in front of you, to travel to where the rear speakers should be then amplify them to audible levels and then reverse the direction of the wave to travel back to the listener. Aren't sound waves somewhat directional? Or maybe I did not understand your question. I heard the new Yamaha single surround speaker thing that is suppose to bounce the rear sounds off walls or something to give the effect but there are quite a few drivers in it. I didn't think it sounded as good as a cheap all in one box 5.1 surround setup. I am no expert by any means. If it could be done it would be pretty amazing, although speaker manufactures probably wouldn't like it much. Let us hear from the experts.
Burton
Burton