First thing come to my mind to ask is, is this Pioneer a multi-zone box? do you require different output to each zone? Sonos is the grandaddy of wireless speakers systems, check them out.
I am an electronics newby, so I really need help from the ground up. According to the specs, the system has HDZONE audio & Video/ and Powered Zone2 Audio. It has 7.2 channels. Does that help? It means nothing to me