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

Have you done that same experiment with a single sub places behind the listening position? It makes sense that that having more bass will better "fill" a room and this is what I think you're describing.

Theaudiotweak:
Rather than stuck in a box I will accept "off the rails" as a compliment. Thanks Tom

I applaud the consistency of your misapprehensions.

Mceljo

No I have not done a single behind the chair sub but I may add a third off to the left side of my room some 14 feet back from my listening chair. I am sure there is a void this 3rd may fill that hole where ever it is.

Soundstage presentation is one of the most important sonic attributes to me. The wave launch alignment pairing of subs and the mains is crucial to make all this happen visually. The subs I currently engage, in the same way as the past three pairs have less bass weight but better mid range. How can a woofer have better mid range especially when crossed over so low..better box design [the box is a passive radiator] and better coupling [brass] extraction of resonant energy to the greater mass of the floor. Tom

An audible and visual floor to ceiling wall to wall sonic presentation. No holds barred and no apprehension of scale or contrast. The 3rd sub may add some weight but I cannot allow it to alter the time and phase coherency I currently have. I would have to blend a mono signal into this 3rd sub at a reduced level from the front pair so as not to disrupt the front stage visually. Tom

Richard Vandersteen and I were talking about this very topic, and he likes even more subs than 2....he likes 3 and even 4. The reason is you get a more even projection of the sound. Yes even with his 7's he gets better midrange and highs by using multiple subs.