think's for your reply ,from your reply I did some further listening tests and found out my wife's oil lamp that is of quit size and ornate and sitting right next to my right speaker was resonating at the frequencies that I thought the tweeter was stressing at, quick fix was between the globe and burner I placed some tack paper cut to size around the base of the globe and burner dampening it . thank you so much , knowing that the tweeters had more life to them made me look further into the problem . I will still check out those Bob Crites upgrades , but I have no complaints on how my KG 5.5 sound right now. I think there one of the best investments I made to my system period.......