So I have a pair of Klipsch i bought new in 1990/91 era, and at some point in the last few years i burnt out a tweet in it. so i bought the Ti replacements, and i'm glad i bought the pair , because the old one is so much more mellow, lol. This new Ti tweet is crispy! so im curious to see if my wife notices, these old ladies have been retired to the great room tv, and my wife has been having problems hearing dialog, so i'm hoping these new tweets will help the center, which is also a Klipsch from the same time frame. Thank you for the info above, it really helped me out! The tweeter that i replaced was the K-84, and the replacement was #127123.