I was wondering if the middle wire (20 guage wire?) is supposed to be used for the remote line, or for a gounding for the RCA cables. I have a 4 guage power wire and my remote line (14 ft long speaker wire) running down the driver's side and my RCA's on the passanger side. I just want to make sure I get the cleanest signal. I ground both ends of the RCA cables, but I'm hoping I'm not creating more noise.

 

that middle wire on the patch cord is for grounding so it supposedly reduce noise...but i've seen it used for remote wire....