I'd really appreciate it if anyone could help me in my time of need! I installed a dixie horn, which works and everything, but it's very high pitched and too quick.
I've attached how I set mine up:

I've made the tubes short and everything like that. I think it could be something to do with the coil my brother suggested (instead of going through to the boot to the fusebox). Any help would be REALLY appreciated. Thanks!!!
Charlie