It’s not vaporware. There are photos of hardware and a patent. Not that you can’t have a “paper” patent. But obviously there is hardware and it’s been demo’d at trade shows. I would like to hear it. I would think it sounds a lot like an AMT in transparency but with more ability to pressurize the air column of mounted on a horn. In my tests with an AMT in a horn, there is improved directionality, but never the 10dB gain you normally get from a pistonic dynamic driver in a horn. The pleated folds “squeezing” air seems to have a hard time coupling efficiently into a waveguide.
https://patentimages.storage.googleapis.com/6c/21/47/a6853d8aa12f9f/US9124964.pdf
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
https://patentimages.storage.googleapis.com/6c/21/47/a6853d8aa12f9f/US9124964.pdf
ESS AMT tweeter. Help for correct use
It does exist...I was going to try one but I already moved on by the time it was finally released.
It does exist...I was going to try one but I already moved on by the time it was finally released.
The Patent holder doesn't make them. He licenses the design and Arya are one of the licensees.
I don't think those copper coloured parts of the pole pieces act as impedance matching devices if that is what you meant? I think they are just working as phase shields - the surface area of the diaphragm is large and if all of it was directly exposed from a single listening angle you'd get nulls in the high frequency response due to path length differences.
Using the back wave is probably also a disaster at high frequency.
edit: Also surprised Dyson hasn't sued Arya yet for the trade name.
Last edited:
One of Oscar Heil patents had a similar but circular arrangement. The inner part of a mylar circle had a deflector/reflector that concentrated the wavefront through a horn mouth.
US3636278A - Acoustic transducer with a diaphragm forming a plurality of adjacent narrow air spaces open only at one side with the open sides of adjacent air spaces alternatingly facing in opposite directions
- Google Patents
US3636278A - Acoustic transducer with a diaphragm forming a plurality of adjacent narrow air spaces open only at one side with the open sides of adjacent air spaces alternatingly facing in opposite directions
- Google Patents
I started an article on a DIY circular Heil a while back, but I doubt I will ever finish it--just too many projects right now. But there may be some useful information in it: Cylindrical Heil – Audiodevelopers Reborn
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.