MartinLogan Fresco [14/20] Dvance

14 ATF (Advanced Thin Film)

ATF (ADVANCED THIN FILM)

ATF Operation

The MartinLogan ATF transducer (based on RADIA planar

technology) consists of a micro-thin, low-mass Kaladex

diaphragm with an ultra-light, etched conductive alu-

minum 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 simultaneously

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-

ethylene 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.