Anyone else notice that the stock horn is extremely quiet when compared to our engines, especially those who are straight piped (like me)?

So I'd like to replace the stock horn....

I had a set of high pitched "trumpet" sounding air horns on my jeep. They weren't too expensive, came with a small air compressor and worked alright. However, I'd rally like to do some that sound lower in tone.

Space in the bed and tool box is already limited so I don't know if I could do an air tank.

Any suggestions?