I have owned many different subwoofers throughout the years. I like the rel theory of running the mains full and blend in the subs even if the mains are full range. I also use jim smiths and others recommendations on placement and settings of the subs. I use usher mini dancer 2 DMD speakers running full range. My dedicated treated room is 26'x16' with a 12' ceiling. My subs sound best near the front corners in front of the corner treatments and toe'd in quite a bit.
Good luck
Good luck