Martinlogan i Manuel d'utilisateur télécharger pdf (Page 15)

Since the beginning of audio, achieving smooth dispersion

has been a problem for all loudspeaker designers. Large

panel transducers present even more of a challenge

because the larger the panel, the more directional the dis-

persion pattern becomes.

Full range electrostats have long been one of the most

problematic transducers because they attain their full

range capabilities via a large surface area. It looked as if

they were in direct conflict to smooth dispersion and

almost every attempt to correct this resulted in either poor

dispersion or a serious compromise in sound quality.

After extensive research, MartinLogan engineers discovered

an elegantly simple solution to achieve a smooth pattern

of dispersion without degrading sound quality. By curving

the horizontal plane of the electrostatic transducer, a con-

trolled horizontal dispersion pattern could be achieved, yet

the purity of the almost massless electrostatic diaphragm

remained uncompromised. After creating this technology,

MartinLogan developed the production capability to bring

it out of the laboratory and into the market place.

You will find this proprietary MartinLogan technology used

in all of our products. It is one of the many reasons behind

our reputation for high quality sound with practical usability.

This is also why you see the unique “see through” cylindrical

shape of all MartinLogan products.

MicroPerf

Stator

The MicroPerf stator design reduces the size of individual

holes in a stator, allowing more openings per square inch

than a standard MartinLogan stator. This maximizes effi-

ciency and dispersion of small stat panels and also increases

optical clarity. In addition, the tighter grid of holes permits the

MicroPerf stator to drive the diaphragm extremely uniformly.

The diaphragm in the Cinema i employs an extremely

sophisticated conductive surface that has been applied to

the polymer surface at an atomic level using a plasma

bonding process. A proprietary compound is driven into

the surface of the polymer film in an oxygen free argon

chamber. This process allows extremely uniform surface

resistivity characteristics, an optically transparent surface

and adds no mass to the diaphragm. This uniform surface

resistivity controls the electrostatic charge on the

diaphragm surface and regulates its migration. As a result,

no discharging or “arcing” can occur.

Transducer Integrity

All MartinLogan transducers begin with two pieces of high-

grade, cold rolled steel. These steel pieces are then custom

perforated and insulated with a unique composite coating.

This proprietary coating insulates the stator to three times

its actual needed working voltage and gives the Cinema i a

wide margin of safe operation. In addition to the electrical

insulation properties, this coating also provides the Cinema i

with a durable, attractive finish that dampens the steel to

prevent ringing. These pieces then sandwich a proprietary

diaphragm and spacers into a curved geometry, and bond

together with aerospace adhesives whose strength exceeds

that of welding.The result of these advanced technologies

is a transducer that is attractive, durable, highly rigid, well

dampened, and neutral.

Low Voltage Power

To eliminate the need for a traditional IEC power cord and

broaden ease of installation, especially for custom installers,

the Cinema i features a low-voltage power supply.

Curvilinear Line Source (CLS

) Plasma Deposited Diaphragm

MartinLogan Exclusives 15

MARTINLOGAN EXCLUSIVES

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Martinlogan i Manuel d'utilisateur Page 15

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