To give you an idea how big those Klienn 220s are is a picture below with a dollar bill laying beside them... But they are the ones that give off the deeper sound I was looking for... The Hammer4s where decent horns but they didn't give off the lower tone I was looking for... So with all 6 together they sound pretty much like I want.. That is unless I can find (and figure out how to mount) a horn from a barge tow boat on the truck...

 

That's why I put mine under the bed - plenty of room to work with. The Kongs are even bigger than that and sound exactly like a train!

 

I know that thier is room under the bed, but I wanted the maximum horn volume to be forward and down, not behind the vehicle. When running at highway speeds I want the people in front of me or beside me (that are about to do something dumb) to know where the sound is coming from. I didn't want to deal with weather issues, and I also occasionally cross low water bridges that would cook a compressor mounted under the body... and if water gets into those horn reeds there might be a problem... Installed where I have mine is completely protected from the weather, water line (water crossing) would have to be above my waist sitting in the drivers seat to effect the compressor and if thats the case then air horn damage would be the last thing on my mind...

Not knocking your install (it looks great) but since I did mine the way I wanted (using dead spaces), now I have all that "under the bed" room still left to add anything else I want later on if I feel the need too...

I have seen those Kongs, I feel pretty comfortable saying that I could get them to fit in the same place that my Hammer4s are (there's still room)..

 

Mine are facing forward and down. You get the best coverage and loudest effect with the sound firing down and bouncing up off the road. Also, the larger area of the bed reinforces the pressure wave.

Under bed forward/down firing is the best place to mount train horns, no doubt. It's pretty dry around here so I don't have to worry much about water, and I don't drive it at all in the snow. That's what the '07 is for.

 

there are installs shown on http://www.dodgeram.org/tech/mods/index.html

 

It doesn't really matter how or where you mount the horns. They will be plenty loud enough. You are going to get everyone's attention when you sound off, especially when the tank is at full pressure.

 

I saw a truck with them mounted on top of the cab a few weeks ago. Looked pretty dorky.

 

i have 2 sets of train horns that i dont need anymore. one is trimed a bit. heres a photo of the untrimed set beside a 2litre bottle. yes there big. pm me if anyone is interested. its pretty tough to fit train horns on a dodge! they fit good under the side of the box somewhere. my friend trimed his a bit to fit.

 

Here's my set-up..

Viair 480C Compressor and 3 gallon air tank on the drivers side frame rail:






Grover twin trumpet horns on passenger side frame rail (under passenger side floor) I got the horns from a class 8 truck wrecking yard for $25.00. The horns are fed air through a 3/8 air line and 3/8 electric valve. (more air = LOUDER BLAST)

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I also plumbed 3/8 air lines to the front and back bumpers and installed quick disconects to run air tools and air up/down tires.

 

A friend has a set of train horns off an old train from years ago. He said that he has to have them hid so they don't get stolen. He has them mounted on an 18 wheeler so he has lots of air. I swear no word of a lie you can hear them for miles, in fact the last time he let loose he was 3 miles from me and I had no trouble hearing him.

 

nice work on that three gallon tank, thats where I wanted my 8.5 gallon but it would not fit. not sure how happy that viair is going to be out there in the elements, I moved mine inside my toolbox after the first one died, actually have 2 380c's in there fillin the big noise tank. I will emplore you tho, get rid of the electric solenoid valve and go to a hand valve, like a 1/2 inch ball valve so you can talk the horn, not just all or nothing.

 

i have a set of dual horns laying around the house, where would be the best place to pick up an onboard air and tank setup? id also like this setup to be able to support airbags in the future