Summary: I seem to be a sucker for beastly speakers and this one suits my bass needs nicely. This thing is a power hungry room shaker. She likes large spaces and is there to provide the serious punch when things explode in movies as well as handle the low lows. Fully sealed 15" with good excursion. Claims have been made that it will get down to 10Hz in the right environment and although I can't prove it, I can certainly believe it.