Long story short, my low note horn has been busted for about a year.
I got a cheap little horn off of a Honda Spree and installed it until I could find a inexpensive, loud horn to replace it.
Today, I Installed the new horn I bought, and put the Honda Spree horn in the rear bumper.
It's been discussed on here before to mount a bicycle horn or something to honk at pedestrians, or in situations when you need to do a up-close honk, just to let someone else know that you are there... but I think I am the first to actually do it.
Here is a video of the new horn up front:
http://www.youtube.com/v/RYGnyVRDE04
And a video of the rear horn:
http://www.youtube.com/v/xSVz-Pli_2Y