Please help me with this. This has to be one of the most weird things that has ever happened to me. I hooked up a new system in my car and like always I run the power wire/remote down the driver side, the rca cables down the console, and speaker wires on the passenger side. I have this horrible whine but only when hook up my sub rca's to the amp. It doesn't seem like it's there when I have just the Mid/Hi amp hooked up. When I ran the cables from the pass-thru on the mid/hi amp to my sub amp, it seemed like it went away. What could this be?