MartinLogan Sequel II - Manual (Page 9)

Page 9 Sequel II User's Manual
Vapor Deposited Film Vapor Deposited Film Vapor Deposited Film Vapor Deposited Film Vapor Deposited Film
The diaphragm material used in all Martin-Logan
speakers employs an extremely sophisticated conductive
surface that has been vapor deposited on the polymer
surface at an atomic level. A proprietary compound is
vaporized then electrostatically driven into the surface of
the polymer film in a vacuum chamber. This process
allows an optically transparent surface adding no mass
to the diaphragm that 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 Integrity Transducer Integrity Transducer Integrity Transducer 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 compos-
ite coating. This proprietary coating insulates the stator to
3 times its actual needed working voltage and gives the
Sequel II a wide margin of safe operation. In addition to
the electrical insulation properties, this coating also
provides the Sequel II with a durable, attractive finish that
dampens the steel to prevent ringing. These pieces 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 trans-
ducer that is attractive, durable, highly rigid, well
dampened, and neutral.
Curvilinear Line Source Curvilinear Line Source Curvilinear Line Source Curvilinear Line Source Curvilinear Line Source
Since the beginning of Audio, achieving smooth disper-
sion 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 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, Martin-Logan engineers discov-
ered an elegantly simple solution to achieve a smooth
pattern of dispersion without degrading sound quality. By
curving the horizontal plane of the electrostatic trans-
ducer, a controlled horizontal dispersion pattern could
be achieved, yet the purity of the almost massless
electrostatic diaphragm remained uncompromised. After
creating this technology, Martin-Logan 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.