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Quest User's Manual
Curvilinear Line SourceCurvilinear Line Source
Curvilinear Line SourceCurvilinear Line Source
Curvilinear Line Source
Since the beginning of Audio, achieving smooth full
range dispersion has long 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 dispersion pattern becomes.
Full range electrostats have always been one of the most
complex 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, Martin-Logan 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 controlled horizontal dispersion pattern
could be achieved, yet the purity of the almost massless
electrostatic diaphragm remained uncompromised. After
creating this technology, we developed the production
capability to bring this technology out of the laboratory
and into the market place.
You will find this proprietary Martin-Logan 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 Martin-Logan products.
Vapor Deposited FilmVapor Deposited Film
Vapor Deposited FilmVapor Deposited Film
Vapor Deposited Film
The diaphragm material used in all Martin-Logan speakers
employs an extremely sophisticated vapor deposited conduc-
tive polymer surface. A proprietary conductive compound is
vaporized then electrostatically driven into the surface of the
polymer film in a vacuum chamber. This process allows an
optically transparent membrane, adds no mass to the dia-
phragm and is extremely uniform in its surface resistivity
characteristics. 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 IntegrityTransducer Integrity
Transducer IntegrityTransducer Integrity
Transducer Integrity
All Martin-Logan transducers begin with two pieces of high
grade, cold rolled steel. These steel pieces are then custom
perforated and insulated with an exotic composite coating.
This proprietary coating insulates the stator to 3 times its
actual needed working voltage and gives the Quest a wide
margin of safe operation. In addition to the electrical insulation
properties, this coating also provides the Quest with a
durable, attractive finish that dampens the steel to prevent
ringing. The finished metal plates are then sandwiched with
our exclusive vapor deposited diaphragm and spacers into a
curved geometry and bonded 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.