The Voxativ Ampeggio doesn't use a Lowther drive.
"In time, Adler shifted her engineering efforts from rebuilding Lowthers to designing and making her own 7" dual-cone driver. "I saw three things that I disliked about the Lowther driver," she says. "One, it was impossible to make good bass: The cone had insufficient stability at high excursions. Two, it had the famous Lowther 'shout' that made voices sound sharper than real: The louder the driver played, the worse the shout—but turning them up was something people wanted to do, to get good bass. And three, the top range was missing: There was nothing over 15kHz. So it was clear, I had to design my own driver."
Cosmetic similarities aside, Adler's Voxativ AC-3X driver is indeed a different animal. For one thing, the Voxativ's convex surround is the reverse of Lowther's. "We do that to hide something," Adler says, laughing again. "We give the cone more material, more paper, so it goes past the surround at the rear. The cone is effectively larger for the rear wave than the front wave." Adler also says that her surround, the foam for which was developed for Voxativ by a German chemical company, is designed to accommodate a much greater excursion: 10mm total, compared with the Lowther driver's 2mm. The cone geometry, too, is different, and the generously sized whizzer cone has a very slight roll on its outer edge, as compared with the much larger roll Lowther added to their own whizzers beginning in the late 1990s: Adler says that too much of an overlap creates unwanted reflections, and that her more modest crease is just enough for some added rigidity."
I like the look of the Voxativ Ampeggio. IMO, it's a lot more attractive than the butt-ugly Zu speakers.