I dont use a speaker. I went out and got me a cassette adapeter and a mono-stereo adapter plug and use that in my vehicle. I use the equalizer to get rid of some of the distortion, and also turning the volume down on the scanner helps a lot as well. Then i have 6 speakers that my scanner is coming through and I can make it as loud or quiet as I want. The only real downside is that you cant listen to the AM/FM in this mode, but when listening to a 3 ALM structure fire that tends to make one say "Screw the news/music, I'm listening to this." Of course you can also unplug it from the radio so you can listen to the AM/FM and then plug the scanner back in when interesting stuff starts happening. You may already have one of those cassette adapters so that is less money to spend, another plus!