Question on setting up bi-wire to my speakers. The speakers I own have the capabilities for bi-wiring, and am planning on setting up my system that way (B&W 600 S3). However, my receiver (Yamaha HTR5790) only has space to biwire two speakers (assume the front channels). Does this mean I am not able to biwire the rest of the speakers, or do I combine them at the receiver end (into one banana plug)? Also, I am running wire through the walls so am getting the proper speaker wire for code (14 gauge). Is this fine to use for biwiring (running 2 lines to each speaker) or do I need something else? Thanks much for your help!!