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In the Forum: Horn-Loaded Speakers
In the Thread: A different type of upper MF compression driver.
Post Subject: The ProAMT 336PP-12“Posted by Romy the Cat on: 11/4/2012
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 rowuk wrote:
I have heard some nice speakers in Germany using the Mundorf Air Motion Transformers. No saliva, ample "substance" in their tone and a very nice integration.
http://www.mundorf.com/AMTnews/MUNDORF_PRO_AMT_FLYER_2012.pdf
http://www.enjoythemusic.com/superioraudio/equipment/0212/jaton_real_a3.htm
I am not defending the principle, it just seems like a compression chamber could be fed by opposed drivers with an exit 90° to the driver direction IF the distance between the driving surface is considerably less than the wavelength of the highest frequency required.


That 10-12 inch tall driver is an interesting beast.  I never heard the Mundorf’s drivers, never even heard about them. It is possible that they use new and much thinner film that made Mundorf to sound differently then rest AMT. Still, I do not think that topologically any AMT or planar might beat the freedom of naked ribbons. I do appreciate your feedback, Robin, but I still do have my reservations based upon my former experience with AMT.
 
Saying that, I still do feel that this tallest Mundorf is interesting for the guys like me. If you are in Macondo configuration then this type of driver is a very interesting solution.  The 105dB sensitively (if it is true) made it to match classic 109-110dB sensitive MF channels and that is very good.

Sure I would be more open if Mundorf do not shot for absurd for me 2.5kHz crossover point and for 1000W power handling, not to mention the forced air cooling. But it is what it is and I think that the largest Mundorf might be added to the list of Macondo configuration computable candidates. I still think that a long exposure to Mundorf’s AMT will reveal the deep intrinsic AMT illnesses but as I get neither of us are not familiar with big Mundorf well. 

The Cat 

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