I think that's just crazy talk. The divisibility of the speaker has nothing to do with its performance. The reason 10"s and 15"s caught on with bass is because of the B-15 and the SVT. Had a 12" cab caught on like those two, then they would be more of a standard. But I love my little combo with the 12" in it.Might be just mythology, but I thought that 10's and 15's were acoustically best for bass and that even number speakers, like 12's were...not? Had an Acoustic 18' reverse mounted cab decades ago that was louder in the parking lot than on stage.
Anyone else think multiples of 5's are better for bass?

