I haven't stacked and measured boxes to find out for sure, but in theory it should work that way. When the weather allows I'll have to do so and see. Pro-sound is a different animal, the key there is minimizing the size of the frames between horn mouths, and that's accomplished by using multiple elements on multiple throats that converge into a single mouth. Then the only obstacle to integration is the size of the frames separating the individual cabinets, but at the distances involved between the source and the audience any lobing pretty much has disappeared at the listening positions.