Anyhow, I'll agree with Old Guy that choice of horn type / HF driver is a personal preference or - for a manufacturer - an application dictated by swings and roundabouts... that is, finding a balance of attributes that fits the matter at hand.

I had a set of 802/511Bs + 515B in 825 cabinets during the 1980s and they certainly sufficed at the time -- the 511s were quite pleasing on-axis so I understand why they're still sought.

BobR