Room placement can play a part in this as well. Experiment a little. I have the PCi 20-39 and I have it at about 30% of max volume and it is loud. I have a home theater area in my basement so I have a lot of air volume to push around (the half of the basement that is used by this is about 12x45x8, and the whole open basement area is about 900 sq feet (7200 cu feet) and I feel the bass at that setting and that is without it seeming to be "cranked up" or anything.
You have pretty much the same sub components as mine, but mine is a little tall and can go a little deeper, but you should be feeling the place shake.
