I've tried the FE126en drivers, which seem similar, though slightly larger. First, I built a base reflex cabinet from plans on the Fostex site, but didn't like them. They sounded flat, muted with weak base. Then, I made a pair of folded horn cabinets using BK-12m plans from the Madisound site. That was a big improvement and not difficult. I currently using them in my office with a Stereomour and I think they do fine without a sub.
Pat