Magnet AssemblyTo create a “voice coil,” you need a former. Traditional loudspeakers use circular or square cross-section wire wrapped around a cylindrical former. Magneplanars use something akin to more modern printed voice “coils” sometimes used in tweeters. Instead of wire, a very, very thin aluminum strip is attached, by hand, to Mylar film. When placed in proximity of the magnets, this drives the entire surface of the film. Mylar is also dimensionally stable and not hygroscopic which assures proper tension across the frame.