Horn Replacement

[Another JR]

I’m wondering if someone can recommend a drop-in or close to drop-in replacement horn that is a bit louder and lower toned than the stock horn. If the stock horn is a one and a train horn is a ten, maybe about a three.  It’s embarrassing watching people turn their heads looking for the Subaru when I hit the horn. 
 

Thanks

[scwidy]

Mine wasn't a drop in, I had to fab brackets but I had to get ride of the bicycle horn they put on these as well. I went with airhorns.