Is Bass Non-Directional In A Two-Channel Rig?

I still find this research pertinent and it will answer some of your questions.

http://www.harman.com/EN-US/OurCompany/Technologyleadership/Documents/White%20Papers/multsubs.pdf

Kal

A room an enclosure and free air are all passive radiators so they all must be incompetent. Tom

08-15-11: Theaudiotweak
"You can hear where the bass originates even below 40 hz".
Well maybe if crossed at 40HZ @ 6 db per octave, maybe, but crossed @ 12, 18 or 24 db per octave. I wish that I could quote some test somewhere, but I have had hundreds of people demo subs that had no idea where it was, even when sitting on it crossed @ 80HZ @ 24db per octave.
I guess it is possible that your hearing is more sensitive at those frequencies than others or you could be dealing with room nodes???
No disrespect intended, its just that we have tested this theory countless times.
I have seen cars rattling windows a block away and no one could tell where the boom came from until it drove right past us...
Have you done some testing to substantiate this?

Theaudiotweak:

A room an enclosure and free air are all passive radiators so they all must be incompetent.

C'mon. The dimensions are quite different and, therefore, so are the frequencies. Besides, those are a constant so that adding a sub will make no difference in their effect.

There is a lot known about the science of acoustics but it always amazes me how few audiophiles make the effort to learn about any and prefer to rely on hear-say.

Kal

And their are those who look beyond what has been published yesterday. The most important word you posted is 'hear' A box has boundaries and so does a room. When pressurized they generate upward harmonics even from applied electrical slopes of 24db. I have used eight different pairs of stereo subs over the the last twenty nine years in four different homes. I would never again consider using a single sub in my music room. Tom.