Couldn't have said it better myself. But what also should be noted is that horns can make very efficient use of drivers, and therefore are quite cost effective. If you make a horn so small that you need a whole bunch of them to work right, and thus a whole bunch of drivers as well, then you're losing out on one of the main benefits of having horns to begin with. You're better off just finding a self-standing design that is of a size that you can deal with.