Originally Posted by ADW
What I'd recommend instead of a Stebel are Goldwing GL1800 horns. Loud as hell, sound like a train, and Honda has great build quality. Pretty easy to find on CL or eBay. Make sure you get the GL1800 twin horns set.
+1 on the GL 1800 horns. A Goldwing was the first motorcycle I've ever owned that I didn't feel the need to immediately upgrade the horn on. I have a pair of GL 1800 horns given to me that I'm planning on mounting on my FJ 1200.