A multilayer type of PET diaphragm...http://www.teijindupontfilms.jp/english/product/mlf.html Been around for a while and nothing really new. Just a new name to be more exciting. Philips new driver is a PET driver as is quite a few others. A bit of marketing there to jazz it up. Same ol' it's in the execution of it and don't get caught up in the name thing. Though multi-layer is a good thing for sound whether it be PET, bio-cellulose etc.
4/19/15 at 11:17am