Quote Originally Posted by frank23
In my home, I'd like:
- floorstanding cabinets
- that come out to have the high frequency driver at ear height to catch all those high-frequencies.
Please look again at the 4430 spec sheet:

http://www.jblpro.com/pub/obsolete/443035.pdf

There's virually no highs lost at 10° up (Fig. 5) and that's where the time-alignment is optimum, as well, with the stock crossover and the horn mounted 1" forward of the woofer.

I'm not arguing against raising the horn, as you like, rather, merely suggesting that it's not so necessary as might be assumed from experience with other horns. Constant directivity works here; 4430 translates well as a home floor-stander....