What about the cabinet you plan on mounting the tweeter in?
Even though this tweeter has a wave guide, it still may generate a peak & valley in it's lower frequency range due to diffraction. The data published by the manufacturer was made with the tweeter mounted in free air (no cabinet or baffle) or on an infinite baffle. You cannot assume there will be no diffraction when its mounted in your cabinet.
With tweeters with flat mounting plates, their interaction with cabinet edges can have a major impact on the crossover frequency selection. It depends on the distance between the tweeter and the cabinet edges. The only way to be certain what this tweeter will do is to see it's frequency response while mounted in your cabinet.
With small diffraction peaks & valleys there are effective ways to minimize them. Rounded edges, off-set tweeter mounting, or felt baffle surfaces can all help. But if the peaks & valleys are large enough in amplitude, the best way is to avoid the problem by increasing the crossover frequency.
Here is an example of a ¾" dome tweeter, with a flat mounting plate, on an 8" wide cabinet. Without a crossover, there is a broad peak between roughly 1500 and 2000 Hz, followed by a valley centered between 2500 and 3000 Hz. All tweeters will have a similar profile in this box. What will that Wavecor tweeter do in your cabinet?
View attachment 32079
For detailed explanations see these links:
https://www.linkwitzlab.com/diffraction.htm
When people build a speaker box, they only factor the internal volume. The shape of the box, baffle design and driver placement are important
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