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Stereo Loudspeaker System

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A completely new standard of performance, the standard of an ESS Heil air-motion transformer, has been brought to popular sized loudspeakers with the introduction of the exciting new ESS AMT 5 reference bookshelf.

This compact and convenient loudspeaker, the only AMT system from ESS that can be placed vertically or horizontally, uses the latest development in ESS Heil air-motion transformer high frequency drivers - the ESS Heil power-ring air-motion transformer tweeter.

Created expressly for use in the AMT 5, this unprecedented tweeter finally allows the absolute purity and exciting transient resolution of an ESS Heil air-motion transformer system to become available in the universally popular and adaptable bookshelf size loudspeaker.

The ESS Heil power-ring tweeter has a miniaturized sixteen-fold diaphragm, suspended in a powerful magnetic field, which radiates through precision machined slots in a ferrous metal ring. It operates with the identical and unique air squeezing principle of the larger ESS Heil midrange/tweeter air-motion transformers to achieve an equivalent transient clarity, wide stereo imaging and complete freedom from fatigue-producing distortion.

This new ESS Heil power-ring is matched through a precision, multi-stage crossover to a powerful 12-inch air suspension woofer developed by ESS for deep, high impact bass and a defined, uncolored midrange.

The ESS AMT 5 reference bookshelf is a revelation in sonic accuracy that was impossible in popular systems before development of the ESS Heil power-ring air-motion transformer tweeter.

Whatever your taste in music, the choice of an easily accommodated, less expensive speaker system is no longer limited to outmoded acoustic designs. Now, for only a few dollars more than conventionally engineered products, you can own and enjoy the incredibly clean reproduction and built-in lasting value of an ESS Heil air-motion transformer, the loudspeaker of the future.

Finally from ESS, a state-of-the-art bookshelf, the ESS AMT 5 reference bookshelf.


Type: 2 way, 2 driver loudspeaker system

Frequency Response: 40Hz to 20kHz

Crossover Frequency: 1500Hz

Impedance: 4Ω

Bass: 1 x 12"

Tweeter: 1 x ESS Heil air motion transformer

Dimensions: 13 x 15 x 24 inches

Weight: 35lbs

Price: USD $189 (1974)

Year: 1974


test report   English - rcalvill

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