I bought a used MEN220 on Audiogon last year. It made mating my Magnepan 1.7's and Paradigm PW2200 subwoofers seamless. I suggest you get at least six room readings to get over 95% correction. I was surprised at how much more even the frequency response was and there was much more clarity from top to bottom. It also clarified the already great imaging thrown by the 1.7's - just listen to choirs singing. The Focus position is for single-person listening, and makes everything just snap into, well, focus!