04-16-2015 Post does not mapped to Knowledge Tree Paul S San Diego, California, USA Posts 2,658 Joined on 10-12-2006 Post #: 1 Post ID: 21631 Reply to: 21631 "SOTA Technology" Speakers from Polymer Audio Research fiogf49gjkf0d Here are some folks who think ultra-stiff cones and cutting-edge technology are the way to go:  http://polymeraudio.com/about/  I did not read all their explanations. I have never heard these speakers. Perhaps they will be at this year's THE Show, at the end of May... Paul S

04-16-2015 Post does not mapped to Knowledge Tree rowuk Germany Posts 454 Joined on 07-05-2012 Post #: 2 Post ID: 21632 Reply to: 21631 Ultra stiff in the head? fiogf49gjkf0d They talk about acoustical alignment, but I couldn't find any. Diamond could be a good membrane material however! Whenever I feel blue, I start breathing again.

04-16-2015 Post does not mapped to Knowledge Tree Paul S San Diego, California, USA Posts 2,658 Joined on 10-12-2006 Post #: 3 Post ID: 21633 Reply to: 21632 Technology fiogf49gjkf0d For all I know, "alignment" is digital. And IMO, so far, "super hard" tweeter diaphragms have not lived up to their "reasoning". In fact, I would have to say the same for any direct radiators with "hard" diaphragms that I have heard to date. Again, like I mentioned already, I have not heard these yet. I did hear the "vaunted" YG Acoustics Al diaphragm speakers, however, and I would say they are "very clear"... to a fault, also they are faintly "metallic, IMO. YMMV, of course; be happy. Paul S