https://youtu.be/f6P0CUjuD5w
https://youtu.be/9Pg8MNNa4p8
Printable View
I don't know if it makes much difference or not but when I installed a set of horns just like that I made sure that the openings where the sound comes out were aimed downwards so that if water got in the horn it would run right back out rather than accumulating inside.