Hi Igor: I have a pair of LaScala II's and thought of perhaps replacing the cossovers just as you have. I haven't done that yet, but what I have done is replace the stock tweeters with the Crites CT-125 models. They are much more impressive physically than the stock tweets, and sound is much sweeter. It's easy to replace them, so if you want to tinker, maybe start here. I love these speakers, by the way!