What are you talking about? The diamonds are about as non-fatiguing as you can get. Anyway, we tried to retrofit some diamond tweeters into the demo 805S at my dealer's shop several motnhs ago and while there were issues as the speakers are not made for the diamonds, nevertheless, the new tweeters vastly improved the performance of the speakers. When it happens it's going to be something the WAF limited are going to flock to.