in the brochure thy do not mention this use thy just say a more compact system

the concept of near field mixing got in vogue a little latter in time

if you sea the arrangement of the drivers is a lot closer with the tweeter and mid at 90 degrees

century gold have a vertical orientation which means more distance

if you see 4412a brochure it states

for applications requiring maximum low frequency output from a bookshelf size monitor. this 3 way system titley clusters its transducers complement for accurate close proximity listening