The Original Great ESS Heil Air Motion Transformer™.

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.

The Air Motion Transformer (AMT) is a type of electroacoustic transducer. Invented by Oskar Heil (1908–1994), it operates on a different transduction principle from other loudspeaker designs, such as moving coil, planar magnetic or electrostatically-driven loudspeakers, and should not be confused with planar or true ribbon loudspeakers.

2020年9月4日 · There've been several threads recently about the remarkable Heil AMT, in all it's forms, so I thought I'd try to start one dedicated to them. There've been entries about restoring the old ones, and about their recent revival by the original maker ESS.

Invented by the noted physicist and scientist, Dr. Oskar Heil, the ESS Heil Air Motion Transformer (AMT) tweeter uses a folded pleated Mylar diaphragm just 0.0005" thick. Its voice coil is a serpentine pattern of precision-etched aluminum, selected …

The ESS Heil Air Motion Transformer is in the top drawer with the horn loaded Decca London Ribbon, the direct radiating Apogee ribbons the Quad ESL57 treble panel, the Focal TDS, lightweight compression drivers and horns like the B&C DE-400TN-8 and the classic Lansing brothers' (James B and Altec).

"Invented by the noted physicist and scientist, Dr. Oskar Heil, the ESS Heil Air Motion Transformer (AMT) tweeter uses a folded pleated Mylar diaphragm just 0.0005" thick. Its voice coil is a serpentine pattern of precision-etched aluminum, selected …

2019年10月3日 · In this speaker review, Oliver Masciarotte and Kent Peterson (of Warkwyn) listen, measure, and listen again to the PureAudioProject Trio15 Heil AMT speaker system. This is a fascinating modular system, in this case designed using an ESS 6" Air Motion Transformer (AMT) and two Eminence 15" drivers, specifically optimized for use in open-baffle ...

2021年2月23日 · Heil AMT Review. Since I’m taking a breather from the 18 liter boxes, I decided to take another look at this Heil Air Motion Transformer (AMT) tweeter that has been bugging me for a long time. This particular AMT was used in the ESS PS-820, a vintage speaker that was introduced in the late 80s.

2024年3月28日 · The main driver is the AMT (Air Motion Transformer) by Oscar HEIL, which for us is the best mid-high in the market. Using a planar diaphragm it has the transparency of the electrostatics, it is a dipole and it’s probably the fastest (15 ms square wave rise time) driver in …