Huffer,
John Brought up a point where I let you down. You DO need six cables, but the subwoofer cable which comes out of your pre-amp, assuming you have a powered subwoofer, goes directly to the the subwoofer and NOT to the amplifier. So, that 3rd double cord would only have one side of it used from the pre-amp's center channel output, to the amplifier's center channel input. Assuming your amp is not located on top of the sub, the other side of the cable would just not be plugged into anything, and you'd need a separate cord (like
this) to reach your sub.
By the way, some of these "double" cords can be separated if you gently pull the ends apart, thus ending up with two single cords. My Dayton cords do this.
