I am in the process of setting up the sub woofer i had with my Tannoy 5.1 fx speaker set. It states to connect the subwoofer with a RCA cable to either the left (red input ) or the right (white input). Am i right in thinking that a RCA cable is just a normal audio red & white cable ie one which is used to connect a dvd players audio or Tv audion to an amplifier or is it different. Also soes it make a difference as to whether i use the left or right connection. Also what benefits does connecting in this manner have over connecting by ordinary speaker cable (which is also an option with this subwoofer).