Transar/atd information wanted

[Jan Dupont]

Hi All,

Need some help/information on this USA made Transar/atd Current Source Power Amplifier....

Looking for any information and a schematic....

There was a short thread on this started on 2011. My Danish friend Erlend commented on this in 2014, but now the Amplifier has shifted owner to another of my friends, and I promised him to try to gather some info on this.

 

[Keith Taylor]

Jan, Transar was the name of an AMT (Air Motion Transformer) loudspeaker made by ESS. Unlike the pleated diaphragm versions this one had moving coil motors connected to multiple "cones" akin to more normal speakers.

I believe the device was a difficult load to drive with normal voltage feedback amplifiers. This probably led to the company exploring other amplifier types.


You can see some info if you do a search on the terms "transar amt"


Keith

 

[Jan Dupont]

Thanks Keith, I will search for those threads and have a look...

Jan

 

[tiefbassuebertr]

under
https://www.diyaudio.com/forums/solid-state/198147-ess-transar-current-source-amp.html#post6342013
there is a high resolution image
more URLs
ESS Laboratories 12" AMT Series Loudspeakers
https://alahabapivycy.ga/74.jsp+&cd=14&hl=de&ct=clnk&gl=de&client=opera]Ess amt 1b repair manual[/url]
ESS Speakers USA

 

[OldDIY]

The original Transar electronics
Contact
ESS Laboratories 12" AMT Series Loudspeakers