Hey, I would like to know if you were able to find a speaker that worked for you? If so, what model is it? A few months ago, I bought a Uniden Speaker (Uniden model BC20) and the volume was actually lower than the internal speaker in the scanner. I bought it on Amazon and returned it. I suspect that the impedance was incorrect. I also suspect that the 3.5MM jack is designed for a headphone or earplug, neither of which I want to use, since I only use my scanner when driving. Having a earplug or headphone, will create a safety issue. I was reading your post and saw that you were having the same issue as I am. Did you have any luck finding a speaker that worked?