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19
MartinLogan ElectroMotion ESL X Conventional Loudspeaker
crossover point (2,000–5,000 Hz)
crossover point (100–500 Hz)
Critical Zone: 400 Hz–20 kHz
crossover point (400 Hz)
Woofer
EM-
Panel
EXL
Woofer
Midrange
Tweeter
Figure 18. This diagram illustrates how a conventional
speaker system must use multiple crossover networks that
have negative effects on the musical performance.
complex musical signal into the separate pieces
(usually highs, mids, and lows) that each specific
driver was designed to handle. Unfortunately,
due to the phase relationships that occur within
all crossover networks and during the acoustical
recombination process, nonlinearities and severe
degradation of the music signal take place in the
ear’s most critical zone (see figure 18).
The EM-ESL X’s electrostatic transducer can single-
handedly reproduce all frequencies above 400
Hz simultaneously. You have in one transducer the
ability to handle in elegant simplicity the critical
frequencies above 400 Hz.
The crossover phase aberrations that are
associated with traditional tweeter, midrange,
and woofer systems are eliminated. The result is
a dramatic improvement in imaging and staging
performance due to the minutely accurate phase
relationship of the full-range panel wave launch.
CLS™ (CURVILINEAR LINE SOURCE)
Since the beginning of audio, achieving smooth
dispersion has been a problem for all designers.
Large panel transducers present unique challenge
because the larger the panel, the more direc-
tional 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 dis-
persion 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.
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