I think the term large or small when selecting speaker size can be somewhat misleading. I think of the Rocket 750's as being a large speaker, but have set it as small and have the crossover at 60hz. AV123 as well recommends setting the speakers to small and using a 60 or 80hz crossover. This seems to work will for movies and multichannel music. For two channel, I would like to be able to set them as large , bypass the subwoofer and just use the left and right speakers.