The recent Aeris loudspeaker development gave me the opportunity to tool a new AMT folded ribbon tweeter to integrate with the
smoothest high efficiency 8” midrange built to date. I have yet to find a driver to challenge it. This silky 8” mid has a range of 7 octaves
with nary a wrinkle in the response, yet a sensitivity of 98 dB. My initiative of providing a 4” AMT that could compliment these capabilities
was met with the challenge of accordion-folding sixteen square inches of Kapton into the 4” long, 1” wide chamber. Neodymium again was
employed to provide the flux density required. But the solution was made even more elegant by mounting the new 4” ribbon on the same
faceplate as its complementary 1” AMT ribbon super-tweeter. The results were more uniform dispersion and tremendous attack. Treble
now had
weigh
t instead of tizz. A natural fullness in the treble is exhibited that reminds us why we love high-end audio so much. The
effortless way it forcefully squeezes out acoustic energy is readily verified by placing ones hand over the driver faceplate and feeling the
suction against your palm (nope, you won’t hurt it). These new drivers may be refined, but are equally rugged.
I am fortunate to have chosen loudspeaker development as my life’s work. It has utilized my chemical engineering, physics and mathe-
matics background almost daily. It has offered moments of both humility and glory, but most gratifying is the reward of continual, stair-
stepped successes even after 30 years. I sense that this is a never ending staircase to be followed for generations as we asymptotically
approach unattainable perfection.
Bill Dudleston, Chief Designer, Founder of Legacy Audio
Continuing the Pursuit of Perfection
(Legacy Air Motion Ribbons)
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