Nondirectional & Inaudible Bass: What Frequencies?

I think the theory might hold up better in an anchoenic chamber than in real listening rooms. Bass frequencies can excite all kinds of resonances in real rooms the que the listener back to the source of the added vibrations, the bass.

Viridian, excellent point!

Sean, some of Dunlavy's more recent works seem to support your point.

Sean, I'm sure your aware of the downloaded woofers on Dunlavy's Athenas, Catenas, SC IIIA. John Dunlavy told me as a string bass player he liked the results of this approach, but he somewhat avoided the issue when I asked him if it was as accurate as his direct firing (to listener) designs. I have to admit I'm a little dubious of this approach as everyones flooring is different and so would the reflected sound be. Also I suppose that it would have a greater chance of exiciting the the rest of the room and surrounding rooms structure and would probably be limited to ground floor rooms. I really don't think I'd like to live below someone with such an arrangement. Further more as a believer in time coherent designs (I do try to keep an open mind about this, though) it would appear to be a contradiction in that regard. I suspect that it might really work best with omnidirectional "satelite" designs on a somewhat detached ground floor.

Sean , I think Roy Allison designed a system such as you described with a canted down firing woofer reflecting it's sound off a fixed platform some years ago.

Sean, I believe Dunlavy had models with both up firing and down firing woofers.