I see what you're saying Bryan. I've played the 740 and I think the tweeters in that model were great. I've actually placed my ears flat against the tweeters of my 550, and covered up the main speakers.. I even did this with the 540, and could not hear anything from them. I even covered up the tweeters and auditioned many voices and still heard no difference in sound. If they actually work, they really don't seem to server much of a purpose if any at all..

Squeak