Whitemike, I've heard that it's internal with receiver. Changing speakers won't solve it. But if you do and it works. Let Me know. I'll give it a try as well.
I get the crackle, distortion on am stations as well, but worse on fm. Definitely in hd. Played a cd the other day and on 50% volume I noticed some slight distortion in dash speakers. All the issues are in dash speakers.