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