30cm box driver from post 34 got a small whizzer.
Not because of sonic reasons but because it collects too much dust being used in open air only.
After each use its covered with a tissue but protection is not good enough against the dust in a dry desert climate on the long run.
The piezo tweeter horn must be protected, too. Somehow.
Not always is a whizzer necessary. If there is no dust problem:
Below the dustcap of a driver there is lots of radiating surface from the blank voice coil.
The highs are beaming on axis.
With the whizzer dispersion off axis is better.
Not because of sonic reasons but because it collects too much dust being used in open air only.
After each use its covered with a tissue but protection is not good enough against the dust in a dry desert climate on the long run.
The piezo tweeter horn must be protected, too. Somehow.
Not always is a whizzer necessary. If there is no dust problem:
Below the dustcap of a driver there is lots of radiating surface from the blank voice coil.
The highs are beaming on axis.
With the whizzer dispersion off axis is better.
