|AIR MOTION TRANSFORMERS|
|Producers: ESS, Eton, Precide SA
|The Air Motion Transformer - or short AMT - works by squeezing the sound out through an accordion like flexible diaphragm. The AMT is often described as a Ribbon - but that is only a half truth. Looking at the AMT from above you see that it looks like many small ribbons turned 90 degrees so the sides faces the listener. These ribbons forms one long voicecoil which when placed on the flexible mylar in a strong magnetic field make the diaphragm flex.|
Tymphany Linear Array Transducer (LAT) Technology, is a new way to generate sound. I consider it to be a dynamic version of the AMT - therefore you find it on this page.
ADAM midrange Air Motion Driver and plot (click to enlarge)
This German manufacturer makes studio Monitors as well as home/cinema speakers - all using the Air Motion Transformer.
Dr. Oskar Heil, began his research into loudspeaker design, with a study of the peculiarities of the human listening aparatus. The result of this intensive year-long research program led to his discovery of the principle on which the Oskar Air Velocity Transformer is based. By applying this principle to the design of a loudspeaker diaphragm, he was able to achieve a revolutionary breakthrough in solving the fundamental problems of diaphragm mass, inertia and self resonance.
Dr. Heil concentrated his study on how nature designed and constructed the human ears. Then his studies concentrated on animals of a small proportion, which can produce a loud sound, especially compared to their size. These
The total moving mass is approx. 1 gram, and therefore an almost perfect transducer. The AMT multiplies (transforms) the air motion by a factor of 5.3 (with a total mass of less than 1 gram) and is, therefore originally called an "AIR VELOCITY TRANSFORMER".
Top of the line - the Kitharo
The new Syrinx from Precide
The ER4 is one of the smaller Air Motion Transformers.
Nominal impedance 6 Ohm