Summary: I actually purchased this unit in 2012 and have used for approximately 10 months. At first I actually ordered the HSU ULS-15 Sub which is wonderful. I liked the sub so much I wondered if the MBM-12 would give some more of that clean bass. Well I was not disappointed. Drums, bass guitar and everything on the low end has so much more presence. I have full range loudspeakers and run the MBM-12 in "augmentation mode" (meaning I am running my mains full range).