Oh, sorry, the Maggies are a totally different beast. FYI, I previously posted my personal impressions on mwc's Maggies vs. his M22's here. Yes, typically for low-efficiency dipole planners, they do require a powerful and tolerant power amp. Also, their "effective" foot print is fairly large (although physically they are thin), since the further they are from the back and side walls, the better they sound.