I have been noticing the receive on my President CB sounding all muffled. I thought the match on my Wilson was pretty good, but will have to get out my SWR meter to see how far off the match is. The only way I can adjust this is to adjust my antenna by unscrewing the allen wrench screws and moving the antenna up or down but not much. The President AX 144 (1981) is the CB w/ the receive acting up, my President AR 144 (1980) is doing fine, receive works great. I will have to figure this out and get back w/ all of you. May have my AX 144 looked at.