@Dennis Murphy, a friend of mine bought a set of these a while back and has had an issue with what he describes as a "crackling sound" coming from one of them. He lives across the country from me so I've never even laid eyes on them, but I recommended them to him and just found out he's still having the same problem.
He said he talked with you a little and did some troubleshooting, but never resolved the issue and gave up. He's not very audio-centric and has limited knowledge. I'm frustrated because I know it has to be something simple. He said he tightened some stuff up, tried switching the speakers around and didn't find any loose wires. Could it possibly be an issue with the tweeter?