THE NEW AUDIOVECTOR HIGH FREQUENCY DRIVERS The AMT drivers (R 6 Avantgarde, R 6 Arreté) feature ultra-strong Neodymium magnets, lightweight precision coated mylar membranes and are mounted and decoupled from the cabinet in three points, a proprietary Audiovector concept called No Energy Storage (NES). The tweeters are open to the front and to the rear, and are able to move freely due to the Soundstage Enhancement Concept (SEC). All drivers are handmade in Denmark.