How about "sort of open baffle". I don't have the space in my room to bring the speakers out more than 18" or so from the back wall. Whatever you think of the woofer, this is the best bass response that I have gotten in my room. Doesn't get very loud before the woofers start complaining, but I don't listen very loud anymore. I meant to try them with and without stuffing, but it sounds so good as is that I haven't been motivated to unstuff the full range boxes. Since I cross over the woofers at 80 hz, I don't believe that the stuffing of the woofer boxes is doing much except filtering out any higher frequency sounds from the rear radiation.