Sorry to bump an old thread. Finsup, I've had customers use them in everything form small rooms to massive ones. My listening room is 15' w x 19' deep. I have no problems loading that room with pleasing sound. As far as the low end goes, they perform as advertised, and there are several threads where people comment on just how low they play, and how accurately they do it. The planar tweeter really is a great performer, as is the mid, so imaging wise, I can't see them ever being a problem for your average sized room. Sorry about the late reply, I just found this thread.