Magnepan manufactures or has manufactured the following equipment (click to expand models list):Panel Speakers
Jos van Huizen from Twinstatic(January 2002): Technical Description. Every Magnepan consist of the following parts:
- Permanent magnetic front or backplane, which is perforated
- Membrane with aluminum voice coil wires or flat print traces ( in the treble section)
- Passive or active filter
- True ribbon unit with enhances the treble details and is added to the more expensive, bigger models: MG III, MG3.5,MG3.6, MG10, MG20.1
The alu wiring is glued on the membrane and is used as the bass transducer. Due to the added weight of the wires the impulse response is not as good as the 5 micron thick foils from ESL-loudspeakers, though for pop and rock fans there is a bass, which you can feel as in PA equipment. Deflection of the membrane is 6-8 mm., depending on the model.
The quasi ribbon technique is nothing more than a division of the membrane, which is used for the treble and equipped with thinner alu wire or flat printed circuit tracks (later models: MGSE/ MG12/MG1.5/MG1.6). The flat tracks offload any heath easily and are lighter in weight and are better glued on the membrane surface. The quasi ribbon is far heavier than a true ½ inch alu-foil ribbon which is used in the more expensive models. Details of cymbals, violins have a rough edge compared with a true ribbon or ESL.
The passive filters contain good quality polyester capacitors and reasonable size chokes. The whole concept is proven technology and can play very loud with lots of dynamics. The older models have the membrane fitted at the backside. The sound energy travels through tiny 0,05 inch holes, which gives a lot of diffraction and reflection. The later models from MG12, MGSE, MG1.5 have the membrane upfront and sound far more clear, less muffled. The frames contain iron T bars ( from 1.5 up) to make them more rigid and they give a tighter bass response. For a DIY man it is not too complicated to reverse the panel of the older models.
Roger Gustavsson(January 2002): I have some comments on Jos van Huizen's technical description of the Magnepan loudspeakers. The description is not true for every Magnepan speaker!
- There are also models with magnets on both sides of the diaphragm. Like the treble drivers of the Tympanis (I-D, III-A, III-B etc.). The current MG-20.1 are also push-pull, except for the ribbon driver.
- Voice coils of copper were used in the bass drivers of the earlier Tympanis.
- Maximum movement of the diaphragm is not 6-8 mm. In my Tympanis the space between magnets and diaphragm is about 1.6 mm in the bass and midrange. The push-pull treble driver have a magnet-to-diaphragm -spacing of about 0.6 mm.
- "!a bass, which you can feel as in PA equipment". I don't agree! Pop and rock fans use to complain about the lack of bass power. The larger Magnepan (Tympanis) are more competent in the bass, about 100 dB at 30 Hz seems possible before dynamic limiting sets in. You can have a bit more at higher frequencies but you will need a lot of power then.
- Quasi ribbon vs. True ribbon and ESL. Mass alone is not the whole truth here. Lots of other aspects need to be considered.
- "!and can play very loud with lots of dynamics". I would say that anything below the top models will not do this. MG-2.7, MG-III, MG-IIIa, MG-3.3, MG-3.5 and the MG-3.6, all more or less have problems with playing very loud. And if you play them loud, they will definitely lack dynamics.
The current Magnepans, like the MG-1.6 and 3.6 have a better integration of their drivers compared to earlier models. I guess the magnets on the back of the diaphragms also helps in getting the maximum out of them.
Jos van Huizen(July 2002): Twinstatic Audio comments on the remarks of Roger Gustavsson:
- Twinstatic sells and repairs flat panel (ESL/MSL) speakers. All information about dynamics and bass power is related to other flat panel ( most electrostatic speakers). No comparison is made with PA equipment or cone loudspeakers.
- Tympani's and MG-20.1's are not very often sold in Holland,. we didn't have the opportunity to dismantle them.
- Maximum travel of the diafragm is indeed limited to +/- 4 mm. (measured at SMGA), I might be confused with the figures of the travel of Apogee bass drivers, which exceed this figure.
Magnepan web site (June 2004): The Story Behind Magnepan Magnepan has been manufacturing innovative, world class stereo speakers for over 35 years since Jim Winey, the inventor of the Magneplanar loudspeakers, first owned electrostatic loudspeakers and began the process of experimenting to design an improved electrostat. In 1969, Jim invented the Magneplanar, a thin-film magnetic equivalent to the electrostat and started the company Magnepan, a speaker based company currently manufacturing home theater system speakers.
Magnepan manufactures top quality home speaker systems, surround sound speakers, loud speakers, home theater speakers, audio speakers, best stereo speakers and home theater systems available through dealers in the United States and Canada. We have the audio system to meet your surround sound and amplified home theater needs.
Corporate and manufacturing facilities are located in White Bear Lake, Minnesota, a small community north of the Twin Cities of St. Paul and Minneapolis. Having outgrown its original facilities, Magnepan's current plant is over 50,000 square feet in addition to corporate and engineering offices. While 35 years have passed since Jim first invented the revolutionary Magneplanar Speaker, each and every model is still designed by Jim, and to this date over 200,000 pairs of Magneplanar loudspeakers have found their way into the homes of music lovers the world over.
Jon H: Magnepan has been manufacturing innovative, world class speakers for over 25 years. Jim Winey, the inventor of the Magneplanar speaker, owned KLH 9 electrostatic speakers and began the process of experimenting to design an improved electrostat.
In 1969, Jim invented the Magneplanar, a thin-film magnetic equivalent to the electrostat. Magnepan's corporate and manufacturing facilities are located in White Bear Lake, Minnesota, a small community north of the Twin Cities of St. Paul and Minneapolis. Having outgrown its original facilities, Magnepan's current plant is over 50,000 square feet in addition to corporate and engineering offices.
When Magneplanar production began in 1971, the entire speaker was virtually hand made. Today, after 200,000 speakers have been produced, they continue to be made with the same care and attention, but with tools and equipment that are much more modern efficient. From the taut, clean bass to the silky highs, these full-range dipoles can create a seductive illusion of the original event. It is this sonic reality that has audiophiles hooked.
Once a listener develops a taste for dipole sound, few go back to conventional dynamic speakers. In the last survey of Stereophile magazine readers, more audiophiles owned Magneplanars than ANY other speaker.
Today, you don't have to be a hard-core audiophile to own a full-range dipole speaker.
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