This discussion split off from http://www.diyaudio.com/forums/multi-way/161961-real-expert-just-self-proclaimed-8.html 
Mid bass is easy compared to the bottom end. I think there are many more good woofers you can work with than there are really good low frequency woofers with the extend throw needed for assisted designs.
Mid bass is easy compared to the bottom end. I think there are many more good woofers you can work with than there are really good low frequency woofers with the extend throw needed for assisted designs.
You have misunderstood what I said. Mid bass cannot be multi-sourced spatially smoothed without localization, like <100hz can. Hence the EQ Dr Geddes suggests. But that will be (most probably) single point effective, in a sweet spot, in which case the same can be done for <100 with a single sub.
Not 300 Hz, but higher than 100 Hz, of course it's all room dependent. I have not had localization issues with multiple subs and I've done several and have lots of happy customers who use the technique. Single point is not what I do, and no, one sub won't work nearly as well as multiple subs, not ever.
For a single listener, one sub with eq, placed in immediate proximity (such as directly beside them) won't "work nearly as well" as multiple subs? In what way?
The closer the sub is to you the more readily it is localizable, which aggravates the problem that you mentioned before. Putting a single sub farther away is going to have a poor spatial and frequency response in the room. I don't do anything aimed at a single listener - thats pretty much a waste of time - and multiple subs work extremely well for the entire room. Its the only solution that I have found works all the time.
That could be, I've never tried it owing to the fact, as I said, that I see no point in doing designs for a "single listener". Thats a dead end.
I never said anything about 300 Hz, but lets talk modal region, regardless of where it is. In the modal region multiple subs will yield a smoother frequency response both spatially and spectrally. There are so many papers and so much discussion about this that I don't want to repeat it all here, unless there is some part of it that you don't understand.
Most forum members here are interested in a "dead end" (..as you put it).
In the home for such members occasional "non-critical" music listening use may account for a moderate percentage of listening - i.e. "back ground music listening" where other additional listeners are concerned. But then it is *non-critical*. The rest of the time music listening is pretty much devoted to a "single listener" (..with perhaps an *exceedingly* critical listening experience).
In other words - dual use, but dual expectations.
There are of course "critical" Car listener systems that "buck" this trend, and the occasional Hi Fi enthusiast that wants Audio Multi-Channel/Video as a critical experience. But overall they represent something of an aberration to their general market. (..i.e. not to many people want a Home Theater system where each speaker costs about 1k US (or more), and is larger than a hand-sized cube. And those in the "Car" segment that are willing to spend significant amounts are usually in pursuit of compact systems that can produce high output.)
Now who's target market is a "dead end"?
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