Magnepan Magneplanar Loudspeakers MG-III- Original owner

Description: Experience the rich sound of music with these vintage Magnepan Magneplanar Loudspeakers MG-III. These speakers are crafted with precision and care to deliver a superior audio experience. The speakers are made in the United States and have been kept in pristine condition by their original owner. With the brand name of Magnepan and model name of Magneplanar MG-III, these speakers are a collector’s item for vintage audio and video enthusiasts. These speakers have not been modified and are in their original state. Amplify your music experience with these vintage speakers that are sure to take you back in time. 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. OverviewMagnepan'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.Sound is projected from both the front and back of the radiating surface. The sound from the back of the speaker is reflected from the front wall of the listening area. This is said to effectively enhance the soundstage – the sense of space and realism – of the speaker. The Magneplanar design, using a passive magnet array, is not a unique loudspeaker implementation, although it was the first of its type. Eminent Technology, Analysis Audio, Apogee and others also employ passive magnet designs. Broadly, these are classed as planar-magnetic speakers.[1]There are other speaker designs similar to the Magneplanar. MartinLogan and Quad Electroacoustics, among others, make electrostatic loudspeakers, which are another variation on the dipole model. Electrostatic speakers operate on a somewhat different principle. While the voice coils in the Magneplanar are conductive wires or foil strips mounted on a sheet of Mylar film, electrostatic speakers suspend a charged conductive film between two grids (stators), which move the film. One disadvantage of both designs is that a very large panel is required to produce deep bass. Magnepan has addressed this by the physical size of the speakers – a physically large radiating surface produces more bass. MartinLogan has addressed the bass problem by mounting a conventional cone bass driver in a separate section of the speaker chassis, generally resulting in a physically smaller speaker than the Magneplanar.Magnepans have a life expectancy of about 20-30 years. Eventually the wires or aluminum strips start to delaminate from the mylar. Delamination will result in buzzing when playing low frequencies, and then get worse. This life expectancy shortens drastically when exposed to heat from a fireplace or heat duct, or UV radiation from being in direct sunlight. Magnepans can be shipped to the factory for repair. Repair can also be done at home. Description: Three-way planar-magnetic bass and midrange system, with ribbon tweeter. Bass driver: 620 square-inch planar magnetic. Midrange: 170 square-inch planar magnetic. Tweeter: ¼" W by 57" L by 0.0001" thick ribbon. Crossover: 18dB/octave low-pass Butterworth at 300Hz, 6dB/octave high-pass at 800Hz, and at 3kHz between midrange and treble. Frequency response: 37Hz-40kHz ±4dB. Power recommendation: 50W minimum, 200W maximum. Impedance: 4 ohms in the bass, 3 ohms in the treble, pure resistive. Sensitivity: 83-85 dB/W/m.Dimensions: 23" W by 72" H by 2" D. Weight: 52 lbs per side.Price: $2250/pair (1986); no longer available (2003—the current version of the MGIII is the MG3.6/R, Manufacturer: Magnepan, 1645 Ninth Street, White Bear Lake, MN 55110. Tel: (800) 474-1646. Web: www.magnepan.com Note: Both speakers are in excellent condition and in perfect working order. Purchased 2 new repair kits (MG3 M/R Bass (complete wiring) and 2 new Covers (socks) for reconditioning. One of the speakers has been disassembled but re-wiring and fabric replacement incomplete. Last picture shows speaker number 2 dissassembled.

Price: 900 USD

Location: Bloomfield Hills, Michigan

End Time: 2024-10-27T20:07:01.000Z

Shipping Cost: 0 USD