I have a Uniden BC246T handheld scanner, and I am really new to this kind of stuff. I seem to have a hard time hearing the scanner very well so I hooked an external speaker to the headphone jack. Will this do any harm to my scanner? The external speaker is one like you would use for a cb radio, it's only about 4 inches. If it matters, it is actually a Uniden Bearcat external speaker. I don't want to hurt my scanner. Any help would be appreciated.