Yeah, "small" and "large" are the terms that sort of got adopted by the industry as a whole back in the 90's, before the corresponding high pass and low pass filters became adjustable. Originally, you'd set speakers to "small" or "large" and crossovers that were fixed - typically at 80Hz, although there were plenty of receivers using crossover points as high as 120Hz - would steer low frequency data to the sub if "small" was chosen. Even when that global crossover started becoming adjustable (as in Outlaw's old Model 1050), the method was still pretty clear. It can become a bit less clear when you offer the option of adjustable crossovers for individual speaker sets, so you can set a speaker set to "large" and then adjust its crossover even though that crossover won't be used. I suppose that one solution would be to design the user interface such that the crossover settings would only be adjustable when the corresponding speakers are set to small and just display a dash or some other non-numeric indicator for speaker groups that are set to large...