Ocean9000
Elio Addict
There would only be one sub. There isn't a need for two as bass is Omni-directional.
I respectfully disagree, microphones may be classed as "omni-directional" (they are not truly, either) but any generation of sound with the possible exception of earthquakes has a point source. Many people have been lied to by audio manufacturers who say that frequencies below (insert the crossover frequency of the manufacturers single subwoofer) are omni-directional when in fact the lower register sound stage is critical for accurate reproduction. It is harder to localize as the frequency drops, but listening is a learnable skill.