You might find this helpful: http://www.psbspeakers.com/audioTopi..._num=1&start=0

Essentially one little tip is to place the sub in the listening spot and move around the room with your ear close to the ground while playing music that involves extended bass passages. When you reach the point where the bass sounds the most blended, then move the sub to that spot and go back to the listening spot and see how that works. I would suggest starting out with your knobs around 12 o'clock and work from there. You can use your receiver to set the crossover, which you might want to keep around 100 for the time being until you get better at doing this sort of thing.