I hope this is the right place. Can anyone tell me the purpose of having 2 pair of 5 way binding post? What is a 5 way binding post? If I have a speaker cable that (of course has -/+) banana clip at receiver output, however when it gets to the speaker it splits off with 2+ and 2-, why? Surely the same signal is being sent to both. I am sure I have said enough or maybe I haven't, but if I keep on I will start spitting out all kinds of gibberish.