Everyone, Thanks for your replies. My reason for asking was I upgraded my Belles with Beyma tweeters and Trachorns and the difference was like having new speakers. Everything people talk about... wider soundstage, more open, the music came alive. Then I added some Extreme slope networks and the beautifuls went away... they sounded like they did before the mod.I made many phone calls and emails with lots of help but even after everything I could not get the "sound" back without going back to the original networks.
I had a pair of RF-7's to use as a comparison, reference to make sure it was not just my ears or equipment.
Thanks again