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ESS AMT3 1975 Review

automojo

automojo

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Finally found this. For fellow AMT addicts-enjoy!!:music::music:
As mentioned, the AMT3 has a fairly flat frequency response (esp for a 1975 quasi omni directional speaker)-and that of the Heil-which would seem to contradict some of those who have mentioned the Heil having a 10db+ response peak @ 7500hz.
Perhaps this is a 'urban legend' of sorts.:scratch2:-or perhaps just mis-information.

Hopefully this might help to clear some of that up as well.
 

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I listened to a pair of AMT 1s for the first time last week in almost 40 years and was very impressed. I certainly didn't hear the 10 dB peak. The 3s look like a much better speaker, the 1s midrange was its weakest point. With the Heil tweeter available again I look forward to hearing some really great sounding modern renditions.
 
Here Mojo . . . easier to read :D

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Thanks Bob!:thmbsp: Much appreciated! h Sorry had my wife scan them at work, and did a quick up load.
The transition driver make a huge difference IMHO-but I agree I have never heard a 10db peak in any Heil speaker.
I recall the one post- the poster was bound and determined the AMT had this 10 db peak and ragged response.
You have to wonder sometimes where people get their information from. Or maybe they are just trying to throw a wrench in the works?:scratch2:
 
No 10db peak here! Thanks again automojo for all of your help! My Rock Monitors are the highlight in my current collection and look fabulous!

Also, thanks for sharing!
 
You can make a speaker look bad by how you possition the microphone. Generally the AMT measures as flat as most high end tweeter/mids but the AMT can move a lot more air.

Thanks,
Ron-C
 
ron-c said:
You can make a speaker look bad by how you possition the microphone. Generally the AMT measures as flat as most high end tweeter/mids but the AMT can move a lot more air.

Thanks,
Ron-C
Click to expand...

Good point,
I always wondered where people got this information-as I have never heard any peak like this in any Heil speaker (samll/AMT) I have heard.
Really, when you think about it-the majority of people-audiophile or not-wouldn't put up with this kind of response deviation.
Some of this peak stuff, from what I have read-IMHO appears a bit agenda oriented-I could be wrong-but none if it makes sense when you actually hear the speakers.
Also, one has to take into account, some of these speakers are nearing 40 years old, and may need some refurbishing before you can truely evaluate what they can do.
Some of this might also be the difficulty seem have in designing a speaker to work with the Heil.
I think the AMT3 provides a great blueprint to work off of, with the appropriate drivers.
 
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I used to sell the ESS speakers. I liked the AMT 1B so much I bought a pair and bi-amped them using the ESS active crossover and powered them with a Hitachi HMA 8300 and HMA 7500. I remember Carly Simon's "That's the way I Always Heard It Should Be" blew me away on that setup.

Oh, and they replaced my ADS L-810's powered by a Dynaco 400. That setup sang with "Diamonds and Rust". But then, so did the ESS, which also were amazing with any horn stuff. The Sheffield stuff was simply unbelievable.

Lost 'em in a divorce. It's ok though. They were too big by then for my new listening room/home (my car). :D
 
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