Stock horn sounds like a door buzzer. Cars can't hear it....or can ignore it.
I just replaced the stock horn on my 07 ST with dual snail type horns. Used original horn mount for the 400db For 500db horn, used the Cast looking screw on top of the right side of the fork tree to mount supplied mount strip. Wired both together and cut the original horn electrical wires at the stock horn and spliced both horns into it. No relays or other wiring to do. Horn button on handle bar works fine. Fit is a bit tight, but with careful placing of the second horn, no problems with interference of any fairing or other bike bits. WOW!! I sound like a big truck.
Interesting but I have another perspective. I have dual Fiamms on my 88 R100RS and they sound like a limousine. Loud and musical... well sort of. My 09 ST has stock horns. Whinny high pitch and grating. But I found drivers respond to the irritating noise even more than the semi musical Fiamms. So I'm going to keep them. Irritating on horns is good.
I'm with you on that. All my friends have quiet exhausts. We do have a small minority of Harley riders who's exhausts will wake the dead though. My safety approach is to filter only when necessary and at a slow speed. Luckily I seldom have to.
I take an entirely different perspective on horns. Maybe because my first bike was a 2-stroke Suzuki 90 back when I was stationed at RAF Mildenhall around 1980. If the RPMs weren't high enough, the horn didn't work at all. If they were high enough, the sound level was quiet enough that shouting would do more good, and felt more satisfying.
I've noticed on other motorcycles in recent times, that my wimpy sounding horn actually caught the attention of other drivers and it shocked me. Pleasantly, I must say, but it was a surprise. One case in point was where I-405 merges onto the northbound lanes of I-5. It was evening and in the winter so the other driver had her window rolled up. I was in her blind spot as she started to merge and I hit the horn button. Did she have the radio on too? I don't know...but she was startled and responded.
So maybe the horn we think is so wimpy, seems that way only because it is designed to focus the sound ahead of us, and not to our own ears?
Here's another thought regarding horns. I'll try to capture the sequence of events of when I'd use my horn.
I see the potential situation ahead. Like in the case of the woman merging into my lane. I maintain my speed and lane position.
I use my horn to "prevent" the situation from being an issue, like her moving into my lane. I maintain my speed and lane position.
I wait to see if she heard it. Will she hear it, or not? Meanwhile I maintain my speed and lane position. We are closing fast at 60 mph.
Will she respond in the manner I feel she should, or not? Meanwhile I maintain my speed and lane position. We are definitely getting closer.
If she doesn't respond like I intended her to do, did it make my position worse? Meanwhile I maintain my speed and lane position. We are now very close!
If #5 is yes, she didn't react like I intended for her to react...now what? Meanwhile I maintain my speed and lane position.
I take evasive action. As I learned on a mission trip to the Philippines, they use their horns a lot...but the right-of-way is determined by the "Rule of Lug Nuts". He who has the most lug nuts has the right-of-way.
Except now, I'm out of time and space and must make an "emergency maneuver" to avoid being hit. And of course, it was her fault, not mine.
Why did I not recognize the potential situation in step #1 -- and simply change my lane positioning to make myself more visible and simply change my speed to get out of her way? It would've made her day and mine far less stressful.
I can't think of a situation where the use of a horn would've actually prevented an accident, that I wasn't better served by avoiding the situation altogether.