It should also be noted that the V3 design in casual investigation looks to allow more excursion from the drivers at the same drive level. Below cutoff, there is also increased excursion due to the larger rear enclosure. There is an according increase in output at some frequencies, and we would have to do some more investigation as to what trade offs come into play realtive to power dissipation in the motor and excursion vs. output. This is directly related to the acoustic loading on the driver. For Brad's use in a home theater with an extension, these trade offs makea lot of sense. If you want to beat on the subs in a concert or club situation used in only pairs, I'm not sure this would be my choice.
Best Regards,
Mark Seaton