I believe Hansen was responding to a question about Paradigm speakers, but his answer was generic. Personally, I would probably not try it on expensive speakers unless either I was for sure planning to keep the speakers for the long haul, or unless I would be willing to spring for new tweeters which could be necessary if I screwed up the operation, or if I ever wanted to sell the speakers in the future. A different tweak I would consider trying is the thick felt pad around the outside of the tweeter. Haven't heard too much about the results of that one from those who have tried it.