Whats the difference between the Katrina and the Shocker 540? Which is louder?
I seem to recall someone from HB saying that they are both fairly similar in volume level. I would go for the Shockers any day. They are the best horns out there if looking at anything other than the genuine Leslie or Nathan Airchime. The nice thing with the Shockers is that you can mount them separately, which I don’t think is possible with the Katrina.
Shockers are plastic and Katrina is metal as well if I’m not mistaken…
But the best bit about the plastic Shockers is that they carry a lifetime guarantee 
Shockers for me over the katrina any day 
I have the shockers here too… Wanted to hear a comparison sound clip myself as the one on the site doesn’t seem near clear for the Katrina… Shockers tone is nice one too
I love my shockers and no rust on the horns. My tank connections already are Rusting 3 months I.
Use brass next time. 
I’m rebuilding my trunk setup with all aluminum parts and #8 AN flare fittings. Lots of fun.
Katrina sounds like this http://youtu.be/XRmP67ewmAA
Let’s say I couldn’t fit one in my focus. Shockers all the way.