Scanspeak came out with these. It’s hard to believe that an oval voice coil would have less distortion than a round one does. I guess that’s why they aren’t showing distortion specs. Distortion probably sells fewer speakers than style does. I have no doubt they have low distortion, but how much does the voice coil shape matter?
Sorry, ScanSpeak Ellipticor D3404/5520-00 38mm Elliptical Dome Tweeter. $653 ea.
https://www.madisoundspeakerstore.c...r-d3404/5520-00-38mm-elliptical-dome-tweeter/
There is a big juicy midrange too.
https://www.madisoundspeakerstore.c...k-ellipticor-d8404/552000-84mm-dome-midrange/
Vance Dickason has tested several over at the Voice Coil Test Bench. I was not impressed by any of the drivers. Some do, indeed, exhibit very low distortion (esp. third harmonic) but they all seem to give up performance in other, important areas. The frequency response and resonances are fairly poor IMO on several of the drivers, especially for the money.
Dan
Dan
Whooah 653 dollars?
Now I see what your talking about.
Would have to see some fancy measurement
to justify that.
Dont know if tooling or development
was little expensive.
But gonna be a hard sale.
hope they get it.
Dome mids are fun too.
very interesting.
Again Oval speakers more about directivity
advantages I would assume
and like to see if it happens.
Mounting ring and rear chamber
still physically limit the center to center
mounting potential.
But at least worth noting the effort
and approach to help vertical
price wise, yes it has to be a low distortion
motor compared to similar priced motors.
But assume be better off axis making the piston
slightly smaller in one direction.
Would be used to help solve vertical issues
in typical vertical mounting.
Useless of course if the mounting ring restricts
the center to center mounting distance though.
Be nice touch if mounting ring was also truncated
as well to the physical mounting as close as possible
to other drivers.
Now I see what your talking about.
Would have to see some fancy measurement
to justify that.
Dont know if tooling or development
was little expensive.
But gonna be a hard sale.
hope they get it.
Dome mids are fun too.
very interesting.
Again Oval speakers more about directivity
advantages I would assume
and like to see if it happens.
Mounting ring and rear chamber
still physically limit the center to center
mounting potential.
But at least worth noting the effort
and approach to help vertical
price wise, yes it has to be a low distortion
motor compared to similar priced motors.
But assume be better off axis making the piston
slightly smaller in one direction.
Would be used to help solve vertical issues
in typical vertical mounting.
Useless of course if the mounting ring restricts
the center to center mounting distance though.
Be nice touch if mounting ring was also truncated
as well to the physical mounting as close as possible
to other drivers.
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at first i thought this this photo was off, it seems all the drivers are oblong, looks weird.
http://www.troelsgravesen.dk/Ellipticor-A50-II/A50_8_1200.jpg
http://www.troelsgravesen.dk/Ellipticor-A50-II/A50_8_1200.jpg
German diy magazine Klang&Ton did develop "Ella":
https://audio-hi.fi/download/pdf/Klang-Ton_2020-3_Ella.pdf
https://audio-hi.fi/download/pdf/Klang-Ton_2020-3_Ella.pdf
Making these drivers will always be much more expensive than a round vc because a round one merely needs to be centered but this one needs to be centered and precisely aligned.
The shape of the voice coil makes no difference to dispersion if it is still driving a circular cone as is the case here. Dispersion is determined by the cone diameter and the wavelength it reproduces ie when wavelength = cone diameter the dispersion will be 90deg.