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16 MartinLogan Exclusives
CLS™ (Curvilinear Line Source)
Since the beginning of audio, achieving smooth dispersion
has been a problem for all designers. Large panel trans-
ducers present unique challenge because the larger the
panel, the more directional the dispersion pattern becomes.
Wide 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 disper-
sion 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 controlled
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 electrostatic 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 MartinLogan products.
Generation 2 Diaphragm
Purity’s diaphragm employs an extremely sophisticated
conductive coating applied to the polymer surface at an
atomic level using a plasma bonding process. A propri-
etary 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 a nearly massless
diaphragm. This uniform surface resistivity controls the elec-
trostatic charge on the diaphragm surface and regulates
its migration. As a result, no discharging or “arcing” can
occur.
MicroPerf Stator
Sleek. Compact. MicroPerf stator technology, featured in
Purity’s electrostatic transducer, reveals more open play-
able area in each panel, offering increased performance
from even more compact stat panels. It is significant to
note that the electrostatic transducer in the radical new
Purity loudspeaker supports the bandwidth and dynamics
associated with traditional electrostatic panels nearly twice
its size.
Vacuum Bonding
To achieve the power, precision, and strength of the
electrostatic transducer, two insulated high-purity carbon
steel stators along with a proprietary plasma bonded
diaphragm and ClearSpar™ spacers are fused into a
curved geometry with an aerospace adhesive whose
strength exceeds that of welding. Our proprietary Vacuum
Bonding process guarantees uniform diaphragm tension-
ing and extremely precise construction tolerances, resulting
in unequivocal precision, linearity and efficiency.
AirFrame™ Technology
Ultra-rigid extruded aerospace grade aluminum alloy
AirFrame™ technology rigidifies and secures the elec-
trostatic panel to the woofer cabinet while at the same
time providing sonic and electrical isolation. Advanced
AirFrame™ technology maximizes the electrostatic pan-
els playable surface area and dipole dispersion pattern
while minimizing potentially acoustically destructive
intermodulated distortion caused by spurious vibrations
and resonance. The result? Ultimate imaging capability,
low-level detail resolution, improved efficiency and overall
accuracy.