ESS AMT-1 AIR Motion Transformer 'Great Heil'


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-28 %

RRP 545,00 €

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-28 %
ESS AMT-1 "Great Heil"
Air Motion Transformer


Overview
This is the original highly acclaimed ESS Heil Air Motion Transformer invented by Dr. Oskar Heil over 30 years ago. Unlike a normal piston loudspeaker that excites the air by alternately pushing and pulling a cone or dome, the Heil Air Motion Transformer linearly squeezes and expands its diaphram.

Highlights
  • Articulate, open sound quality
  • High sensitivity
  • Dipolar output for naturally ambient sound reproduction
  • Pleated diaphragm "squeezes" air instead of pushing it
  • 800 to 20,000 Hz from a single source
  • Diaphragm shape delivers wide horizontal/narrow vertical dispersion


Product Details
The ESS Heil Air Motion Transformer (AMT) tweeter uses a folded pleated Mylar diaphragm of a mere 0.0005" thickness! Its "voice coil" is a serpentine pattern of precision-etched aluminum, selected for minimal weight and high power handling. Unlike a normal piston loudspeaker that excites the air by alternately pushing and pulling a cone or dome, the Heil AMT Air Motion Transformer linearly squeezes and expands its diaphragm's pleats, moving the airload at a very high velocity. Because the moving mass of the Air Motion Transformer is extremely low and the magnetic structure very powerful, this combination results in extremely high acceleration that yields amazing transients.

Moreover, the Heil Air Motion Transformer diaphragm's low mass and high output also allow for an unusually high combination of efficiency and bandwidth to be attained in a single loudspeaker. That is what also makes it able to efficiently reproduce frequencies over the very wide range, between 500 to 20,000 Hz. The AMT is a dipolar transducer, making it act just like a live musical instrument in many cases propagating as much sound to the front as it does to the rear, enabling a more natural and musical ambience to be heard in the listening environment. The diaphragm's shape delivers wide dispersion in the horizontal axis but tightly controlled vertical coverage. This creates a wide soundstage while simultaneously minimizing unwanted reflections from floor and ceiling.

ESS still manufactures the original Air Motion Transformer invented by Dr. Oskar Heil over 30 years ago.

Specifications:
  • Power handling: 40 watts RMS/160 watts max
  • Impedance: 4 ohms
  • Re: 3.4 ohms
  • Frequency response: 800-32,000 Hz
  • Minimum crossover frequency: 1500 Hz at 12dB/octave or more
  • SPL: 100 dB 1W/1m
  • Dimensions: 6" H x 6-3/4" W x 4-1/4" D.
The AMT-1 are latest original packaged products form ESS Lab., United States!

Short data

Usage as Tweeter
Power Handling 100 Watt
Impedance 4 Ohm
 
Frequency from 1000 Hz
Max. Frequency 32 kHz
Sound pressure 1000 dB

Chassis-data

Overall dimensions 172x154 mm
Depth (Total) 108 mm
Front material Plastic
Membrane Type Air Motion
Membrane Material Polyamidfoil
 

Thiele-Small-Parameter

Resonance fs fs: 800 Hz
Mechanical Q Qms: 4.3
Electrical Q Qes: 17.2
Total Q Qts: 3.4
DC-Resistance Re: 3.4 Ohm
Coil Inductance Le: nicht messbar mH
 
Membrane-Area Sd: 180 cm²
Sound pressure dB: 112 SPL

PDF-Product information

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