I got the attention of a dude in a high lift 4 x 4 pickup the other day when he tried to run over me. I have the Wolo trumpet horns on my '14 RTS. Here's how I installed a set on the 2013 RT I had. On the '14 I put the compressor behind the grill on the left side. http://www.spyderlovers.com/forums/...orn-Install-on-13-RT-Part-1&highlight=trumpet
That's what I have. Not as loud as a trucker's horn but a definite improvement over the OEM.