Just installed a Cobra 19 DX IV Compact CB Radio on my 09' Rubicon. Mounted on top of center dash and ran wires behind dash near the windshield. Great fit. Powers up just fine. I mounted a 25W RMS 50W Max Powerhorn from Radio shack under the body. Only issue is that when I press the handset button to talk the "interference" is extreme loud. Sounds like a bullhorn tone. Tried moving the cb unit and speaker around but no success. Any ideas where I am getting the interference from?

 

Ur ground? (I'm definitely no expert in this subject) Just a suggestion....