I think I've finally developed a good hypothesis as to why people think the Bose Acoustimass sets actually put out bass. You know when you've been to rock concerts and heard the sound systems with their huge bass enclosures? If not, then you've never experienced the feeling of a bass bin. As many as 20 or more 18" woofers, all being pushed to the maximum limits of output, and they have a lot of distortion that comes fromt he motor structure operating outside of its linear range. With the Bose Acoustimass subwoofers, they produce this same nebulous bass that doesn't truly go low but it booms right around 80 Hz. The little 5.25" woofers just can't keep up, so they're operating outside their linear range, and creating the kind of bass sound that you get when you're out in the audience of a rock concert and the bass bins are going boom.* *Note that I did not say they actually create a pressure wave. They just go whoof as though you're a long way away from the bass bins. Just a thought.