So that there are no misunderstandings, here is only the relevant part down to 200Hz. It is planned that the crossover frequency to the bass module will be between 150-300Hz - depending on the maximum sound pressure level targeted for Directiva r2.
CTA-2034 and normalized hor and ver sonogram**
***
**In the vertical frequency response measurements, the speaker was lying on its side and the slots were partially blocked, so the vertical measurements show a transition to omnidirectional radiation below 400Hz, which would not occur if the slots were not partially blocked
*** In the CTA-2034 diagram, the lowest gray curve shows "ERDI vertical" (which is not shown in the standard). Above is ERDI and the red curve above it is SPDI.
The VCAD simulation of the crossover (here in the example active BU5@1600Hz) is based on anechoic data measured by
@Justin Zazzi for the individual drivers of Rick's Directiva r2 prototype. A big thank you to Justin, because this step in the development is very time-consuming and crucial for the crossover design.
What the diagrams show is the real expected radiation behavior of the speaker when using the specified crossover.