Flyer, the receiver output terminals should be wired directly to the speakers(which the manual terms "conventional"), not through the sub. Then, the sub should be connected to the sub out on the receiver with a coaxial cable with RCA plugs on the ends. As Tom points out, the manual states that the "xover" input bypasses the internal sub frequency control(a variable low pass filter)and therefore it should be used since the receiver will be controlling the frequencies fed to the sub and a conflict with the internal sub control should be avoided.
