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If you love big electrostatic panels, but have a small acoustic space-a speaker for you!

My review on the Shinjitsu Audio Carbon Diasho speaker just went up on the Stereo Times website. As stated in the title of this thread, if you have always loved the sound of big electrostatic panels, but your listening space is small, this speaker will deliver that sonic perspective even though it’s quite minute in size. Beautifully built with an ESS Laboratories AMT and a horn loaded bass driver it does extremely well with both low wattage tube amps, think SET designs, along with sounding excellent with higher powered Solid State amplifiers.

Take a look at the review for all the details and you might be interested in auditioning this speaker with the comfort that you get a 30 day return policy if is not to your personal taste.
teajay
decooney
1,906 posts
 
Nice. Great to see it!

40 years building with the Great Heil AMT. I worked at ESS building them on the assembly line. Built several custom versions since.

Prefer crossing over at 1,200hz vs 2k to retain Heil midrange magic.

Listening to my custom DEC-AMT28 speakers right now with QS Mono 120 Tube amps. :) And, former low watt triode and strapped triode tube amps too. May retest other lower-watt MOSFET SS amps again with Great Heil. 

FYI, other custom AMT builds by members on AudioKarma, here:
https://audiokarma.org/forums/index.php?threads/custom-built-ess-amt-heil-based-speaker-thread.57722...







speedbump6
760 posts
 
Terry, I bought my ulfers after reading your review on those also. I have no idea what space I will use these ones for yet. Maybe a bedroom area 14x12 or so. 
shinjitsuaudio's avatar
shinjitsuaudio
15 posts
 
Here are some frequency response curves taken in my listening room 1 meter back from the speakers. We found with extensive testing that the Great Heil does not like to be crossed over < 2 Khz as it sacrifices power handling and thins out the midrange. The original AMT 1's from the 70's that I heard in Germany when stationed there sounded bright and boomy to me so we tested in the 2 Khz range and found that the midrange filled in nicely and it sounded far smoother..

https://www.shinjitsuaudio.com/graphs
decooney
1,906 posts
 
There are different versions and materials of the diaphragm for the larger Heil.

The early 1,1a,1b,1c, Monitor, 6 has a brighter sound and more brittle material too. Listening to both versions, yes they do sound different.  The later diaphragm and replacement version performs and sounds a bit softer as well.  With some help from a friend with access to anechoic chamber, testing was performed for my crossovers at 1.2k, 1.5k, and 2k and 1.2k was ideal in my setup. The originals were crossed over at 800hz and 1000hz later on as I recall from old tests.  Some keep spare diaphragms around for that reason. Perfect flat line graphs may not always sound musical, and the heil air motion tweeter is one of those cases for debate for sure. Let your ears be the judge :)     


 
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