Normal
I would not go below about 800Hz with that horn. The specification say that the cut off frequency is 1000Hz, so 800Hz may even be a bit low. Also it looks like the horn is mounted on its side, to give a pattern of 40 degrees horizontal x 60 vertical degree not 60 x 40.https://en.toutlehautparleur.com/media/catalog/product/datasheet/beyma/TD360.pdf
I would not go below about 800Hz with that horn. The specification say that the cut off frequency is 1000Hz, so 800Hz may even be a bit low. Also it looks like the horn is mounted on its side, to give a pattern of 40 degrees horizontal x 60 vertical degree not 60 x 40.
https://en.toutlehautparleur.com/media/catalog/product/datasheet/beyma/TD360.pdf
