Magnepan is a private high-end audio loudspeaker manufacturer in White Bear Lake, Minnesota, United States. Their loudspeaker technology was conceived and implemented by engineer Jim Winey in 1969. Magnepan's speaker design, sold under the brand name Magneplanar (often referred to as "Maggies"), differs from that of conventional speakers in relying not on cones mounted in an enclosure, but on a planar driver system mounted in a panel. A Magneplanar's reproducing mechanism (magnetostatic loudspeaker) comprises thin conductive wires and or foil strips attached to a thin sheet of Mylar residing in a magnetic field created by a vertical array of permanent strip magnets. When an electric signal is applied to the conductors, the resultant electric current moving through the magnetic field applies a force to the wires or tape, moving the Mylar film sheet, which projects sound as a dipole. In principle, this approach relies on the same concept as a voice coil-driven cone speaker, but in a Magneplanar speaker the "voice coils" are attached (glued) directly to the radiating surface. Since the force is applied only to the voice coil in a cone speaker, there are distortion modes called cone breakup; in the magneplanar speakers the force is applied much more evenly over the radiating surface, resulting in fewer distortion modes. More information...
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