Help me understand tweeter placement

[JoshK]

(fyi, I did a search as I am certain this isn't a new question, but didn't find anything)

Something I never understood was why the "super tweeter" is placed beside the HF horns in many of their designs. Is there a good reason for this or is it simple to limit the height of the cabinet?

[DavidF]

I wish I could recall the context of a reply I read here some time ago. Either a direct quote or a relayed quote from Greg Timbers that due to the high xover point there was not so much concern about having the ultra high next to, rather than vertically above, the high horn or high driver (4315). With a lower xover point you could introduce some odd lobing and directionallity concerns if not aligned vertically.

Hope someone could correct or clarify if my memory fails me.

[JoshK]

I fully get the lateral placement of super tweeters, as I agree with that rationale. I guess I was more confused as other models use lateral placement of tweeters (and occasionally mids), not super tweeters, so I thought there might be more to the argument.