Any reason why the driver is off center?
I did hear B, telling someone that Off Center drivers created some advantage in unequal length waves within the cabinet, and less problems.
While B, can certainly explain this with the technical details, consider that this is not a "completely sealed" design in that the only output is from the active driver.
It has a Passive Radiator. This passive "reacts" to the internal positive and negative pressure levels. If the driver is perfectly centered as in a sealed sub, it will experience cancellations/accentuation's of certain resonances.
If it is "off center" then some of that is ameliorated.
Now B, can step in and tell you why it is really that way
