It seems that for weird that it seems there is a difference, to what extend the differnce isworth the extra cash is the question, I honestly am curious about them, I would pay just ot try them, if they work hey, good, fi not, send them back and period...just read below, there is some explanation for the use fo them...Maybe is voodoo, aybe iti s not, the only way to know for me is trying them....

http://www.positive-feedback.com/Issue15/supertweeter.htm

http://www.positive-feedback.com/Issue27/ert_tweeters.htm

No doubt that getting older is madatory, but to mature still remains optional...Join the M80's team!