Heil Oskar AMT

Dr. Oskar Heil, noted physisist and inventor of the Field Effect Transistor, began his research into loudspeaker design, not with abstract theory of how a loudspeaker should work, but 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 Heil Air Motion 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. In the following, we describe the results of Dr. Heils research and how it led to the development of the Heil Air Motion Transformer speaker.

Heil Air Motion ( AMT) Kithara Loudspeaker.
The bass unit is mounted facing upwards to ensure the best phase relationship with the high frequencyHeil Air Motion ( AMT)

Heil Kithara Heil A.M.T. ® Kithara Floor plate measurement 50 x 50 x 4 cm Possibilitiy for 8mm Spikes or wheels	Speaker elements:	1 A.M.T. mid range - tweeter 650 - 23000 Hz	Heil Kithara with floor plate Floor plate is Optional
		1 25 cm bass unit 28-700 Hz.
	Frequency response:	28-23000 Hz +- 5 dB
	Sensitivity:	94 dB 1 W 1 meter
	Impedance:	4 ohm minimum
	Cabinet finish:	oiled walnut, cherry, or black, Maple wood veneer
	Dimension:	40 x 40 x 110 cm including A.M.T.
	Weight: Kithara Wight Floor plate	ca. 35 Kg. ca 7 Kg.


Kithara Cherry	Kithara Maple	Kithara Black	Kithara Walnut

Heil A.M.T. ® Aulos Bookshelf speaker
An intensive study of the different woods has made it possible to achieve the acoustic details in the Bass-region and to match the game-partner Heil A.M.T. The Heil A.M.T. works from 1050 Hz to 23 kHz with its almost mass less membrane. The positioning of the speaker is easy, since the phase correct dispersion has this large advantage over other speakers in the market. The Aulos Bookshelf has the advantage of an uncritical load-behaviour as well as a high efficiency. The low Mass of the Heil A.M.T. drivers guarantees a balanced sound-picture also with rather low levels. The Heil A.M.T. moves the air 5 x faster than conventional electrostatic-, Magnetostat - or dynamic loudspeakers,
Technische Daten: Heil A.M.T. Air-Motion-Tranformer Aulos Lautsprecher
	Principe	2 way, Bass reflex
	Mid-high frequency	Heil A.M.T.® 1050 - 23000 Hz
	Woofer	160 mm Ø 45-1050 Hz
	Frequency	45-23000 Hz
	Cross over point	1050 Hz
	Efficiency	91 dB 1 W 1 Meter
	Impedance:	Minimum 4 Ohm
	wood veneer	Maple, cherry, walnut and black ash, Grill Black
	measurements W x D x H	205 x 275 x 392 mm
	Weight	9.9 Kg.

black

cherry

dark oak

maple

walnut

white

Heil A.M.T. ® Subwoofer for Aulos Bookshelf speaker
	In place of a speaker stand you can improve the bass of the Aulos with the specially designed subwoofer. The Aulos is simply fitted on the top of it, and is then connected to with the two speaker wires. The best result was achieved with a down firing bass in a closed box and slightly compressed in a well calculatedcabinet . Internal we use the resonators as with all other models. measurements: WxDxH:210 x 275 x 565 mm Feet: 225 x 290 Weight app. 13.-- Kg.

SW- Cherry bookshelf	SW - Maple bookshelf	SW - Oak bookshelf

the - signal	the + signal	open and close and how it works

Membranen Details