40hz ratings/speaker response

Thanks Bob(inpepinnovations) for the clarification. This old dog just learned a new trick.

Red, Keep in mind I am "technically challenged", but if your formula and theory is correct, what I really need to do is simply rearrange my listening room, a hassle, but doeable. As the one who started this thread, I have to ask Red, are you kidding? or is that really the way to maximize a deeper sound stage that will enhance bass?
joeb

I have recently read an article that stated that even if a certain low frequency fundamental tone is not reproduced by the speaker, if 2 or more higher harmonics of that fundamental are heard, the brain will psychoacoustically hear the fundamental tone. I have not actually verified this by testing, but it seems interesting. It may actually be the reason that some accurate mini-monitors seem to produce more bass than they should theoretically be capable of. It is common that mini speaker owners seem to be quite satisfied with the bass response of their speakers that are rated only down to 100Hz or even higher. Naturally, room loading and other factors may play into this. Anyone else heard about this phenomenon?

Twl:
www.melhuish.org/audio/article3.htm if you haven't already seen it.

Clueless, thanks, that was where I read it. I just couldn't remember where it was. Also, I noticed he was pretty rough on quarter wave pipes in that article. But, if you really tear any design apart that far, then nothing will really hold up too well to that kind of scrutiny. I'm still thinking that I can get a "happy medium" of decent bass-boost, and limited notch-effects from comb-filtering, from the Voigt Pipes. He didn't even mention the "baffle-step" effect of the Voigt Pipes, where the narrow baffle reinforces the higher freq's and you get a drop-off where the baffle is no longer wide enough to reinforce the lower ones. I've got a couple of tricks up my sleeve to handle this, without resorting to a compensation circuit that destroys efficiency.