Speakers for ham radio should cut off at about 100Hz.. Leave the HiFi, for music. Music that is from a high quality source. I am sure there are many good choices out there. The one I use fits the size of my K3. It is Vertex mobile speaker, made by Yeasu. It has ahold sound and it is very well made. Also it looks good with K3. 73 N6XVT. Karl Sent from my iPhone