Your sub is actually a subwoofer "module" that incorporates circuitry and crossovers within it. You must hook the satellites through the sub module to cut out the low frequency emissions to avoid damage to the satellites. The subwoofer is the brains to your entire speaker setup. You can try it both ways and see which you like best. The LFE option on the receiver is probably much more difficult to tweak as opposed to the Polk setup.
