Cjlundgren,you are quite correct,the maggie ribbon tweeters do not have to be replaced over time because they somehow wear out and the sound changes for the worst. I have had MG-20rs for over ten years and have had two ribbons go out on me. So,unless they rip or blowout theirs no reason to replace them.You're MG-3.6s are great speakers and I'm sure you enjoy them alot.Hope this helps.
