ESS AMT “Great Heil” tweeter?

[GXAlan]

Does anyone know if spin data is available for the ESS Heil AMT? Most of them are used as an isolated driver above a woofer enclosure, so it may be interesting to just take a first order crossover and have it run through a Klippel.

US made but measurements here
https://www.hifisound.de/Do-it-your...R-Motion-Transformer-Great-Heil-Selected.html

 

[phoenixdogfan]

The AMT Heil Air Motion transformer is something I first listened to at age 18, and to this day it impresses me as the absolute best tweeter I've ever heard. Would be nice if someone could find a way of objectively measuring its performance to see if I'm right on or all wet in that assessment..

 

[amirm]

I can easily measure it. Send me one mounted in a baffle and I can test it with Klippel.

 

[phoenixdogfan]

I can easily measure it. Send me one mounted in a baffle and I can test it with Klippel.

I would if I had one.

 

[GXAlan]

I can easily measure it. Send me one mounted in a baffle and I can test it with Klippel.

It doesn't really need to be mounted right? Seems like it is free standing capable?

https://essspeakers.store/products/...-air-motion-transformer™?variant=401309073434