Two subwoofers or One?

The usual advantage of using two subwoofers is that you will most likely spread out nodes due to room interaction.

Nsgarch, I'm not familiar with this particular sub, so I must bow to your experience. It might be worth mentioning that it has been suggested that due to the summing of channels of stereo (i.e. not a dedicated sub woofer channel) signals to mono that it is actually possible to deplete information.

Nsgarch, I can't argue with the truth. I will say that I while most experts agree that low frequencies aren't very directional, I suspect that on some level we are aware of something askew when those frequencies harmonics appear from where they might not aught to be.