I recently got a SA-WM40 powered sub. I love a lot of bass effects when watching a movie. What should i set the levels at. I don't know what the Cut-off frequency does either. And what is the Normal/Reverse switch do? Also, I have a 50 ft regular speaker wire rolled up hooked to it (in case i want to move it). will it enhance the bass if i cut the wire to only what i need? Thank you. P.S. this subwoofer rocks!