Quote from Crawdad: A Digital Signal Processor. Takes the audio from your receive and filters out some of the junk. Has helped me quite a bit on weak signal Rx. Especially SSB DX.There was 2 options there the speaker and the little control box which looks like you use your existing speaker. Was wondering what the pros & cons of each is. I already have many speakers. Is the control box more effective?
Check out West Mountain Radio's site. There's other brands out there also.