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14 ATF (Advanced Thin Film)
ATF (ADVANCED THIN FILM)
ATF Operation
The MartinLogan ATF transducer consists of a micro-thin,
low-mass Kaladex diaphragm with an ultra-light, etched
conductive aluminum surface suspended between two high
field strength neodymium super magnet arrays (see figure 27).
When an electrical current (music signal) passes through the
etched aluminum on the diaphragm's surface it is simulta-
neously pulled towards one of the neodymium arrays and
pushed away from the opposing array. When the direction of
current is reversed the diaphragm is simultaneously pushed
and pulled in the opposite direction, thus producing sound.
Extremely Low-Mass Diaphragm
—Blazing Speed and Inner Detail
Low-mass diaphragms are crucial to a loudspeakers ability
to accurately reproduce sound. As the mass of a transducer's
diaphragm decreases, its ability to resolve detail increases.
With extremely low-mass characteristics, the ATF transducer
tracks the audio signal with almost perfect accuracy.
MartinLogan ATF diaphragms are constructed of extremely
low mass Dupont Kaladex® PEN (polyethylene naphthalate)
—a material chemically similar to the low-mass PET (poly-
ethelene terathylate) film used in MartinLogan's generation 2
electrostatic transducers, yet capable of handling the high
thermal requirements required for stable magnetic thin film
operation.
High Field Strength
—Superb Control and Efficiency
With a field strength almost 2000% more powerful than
traditional systems, Neodymium iron boron (NIB) rare-earth
super magnets are one of the world's strongest commer-
cially available magnetic materials. This incredible field
strength proves ideal for maintaining perfect control over
the low-mass Kaladex diaphragm. Super-low distortion
levels, high-resolution, and crystal-clear transparency are just
a few of the benefits resulting from this superb combination
of low-mass diaphragm and high field strength.