[quote name='scrumpymike' timestamp='1507414825' post='3385386']
Gotcha - so, the "siblings" are the other 10" multis and the Two10 really is designed to be used in the vertical rather than horizontal position.
[/quote]
As I understand it, the reason Barefaced developed the filtering of their 10" drivers was to solve the problem of multiple 10's having poor dispersion - i.e. 4x10s, 6x10s and 8x10s, cabs where there are 2 "columns" of drivers in the same enclosure. The driver filtering in the BF Two10 ensures your sound disperses well whether the cab is vertical or horizontal.
Alex explains it in this video - https://www.facebook.com/BarefacedAudio/videos/10155811226882704/ - it's a good watch from start to finish but he talks specifically about the 10" speaker cabs from about 19:30 onwards.