This company is a Resurrection of one that went out of business long ago. I had a pair of ESS AMT 10b speakers purchased in 1979/1980...they were wonderful. They had a knob on the back that increased or attenuated the higher frequencies and a 10" woofer. I ran it with a Kenwood KA 9100 integrated Amplifier (90 WPC) and a Pioneer TT with Audio Technica stylus. With my audio memory, I couldn't compare it to my current systems but I was very happy with it. I have no idea what the efficiency of those speakers was but assumed it was about 89 dB like most back then.
I still have all this equipment but when I was waiting for my Decware Taboo to be made I decided to have an Adcom amp repaired and when I got it back I pulled out the ESS speakers and hooked it up and after a few minutes they were toast. As I have stated here often, I am not technically inclined but went to the internet and after reading, discovered the amp had been returned to me with a very high Voltage output...I think one channel was 6 or 7 and the other 4 or 5. I found this after buying a meter at radio shack. I have no idea what was damaged...just the woofers or the Heil Air motion Converters but would love to get them repaired someday and try them with the Torri MK IV. Any ideas folks?
If you get a chance to listen to some I would take it. I think some companies, like "The Horn Shop" have incorporated the Heil Air Motion Converter into their designs. Below are pics of what I have. Mark.