Is this a gimmick?

[davidsrsb]

@DCE1198 Allow me to alter my description of how the Audax HD-3P works (post #34). My two introductory sentences should read:

Basically, the alternating voltage signal is applied directly across the piezo polymer diaphragm which pulsates in sympathy - no magnetic field is involved.

The resistance of the diaphragm is infinite and a transformer is required to provide a normal 4/8 ohm load for the amplifier.

The piezo dome actually changed radius, so acting more like an ideal point source than a piston. It measured very well.
Back to the OP, changing to an elliptical coil is going to encourage some asymmetric modes in the cone. I have no idea if this is desirable.

 

[Michael C]

I trust the contributors on this thread are feeling better after expossing scan speaker over there apparently rediculis oval overpriced tweeter/midrange. Now the cats out of the bag,they will have no choice but to discontue that oval line in favor of something more sensible.

 

[Arthur Jackson]

🤣🤣🤣🤣🤣

 

[mayhem13]

and the surroudn tech of Purifi and similar is probably a bigger step in the right direction.

Of course…..they cost near $600 too…..gotta be better

 

[WhiteDragon]

LOL
Yeah just wanted something to match my 6x9's in the doors.
Tweeters cost more than the old truck itself.

 

[head_unit]

Why not square voice coils and poles?

Been there, done that. Even had one with a plus sign shaped voice coil...I doubt I could have gotten that into mass production, it was more a concept to drive more contact line on a flat diaphragm. The "square" coils really have to have somewhat rounded corners, again an experiment with a square flat diaphragm. I didn't really see advantage versus round coils considering the far huger tooling and production costs. The flat honeycomb diaphragms now those had some really good off axis response as I might have mentioned earlier.

 

[WhiteDragon]

Reminiscent of d'Appolito and line array?
The advantage would lie in the horizontal bundling, which results in a more accurate two-channel image. But I think it would makes sense to use this for midrange and bass drivers too;-)

Kinda
A vertical mounted speaker arrangement has no issue with
Horizontal because there is no speaker mounted next to it.

So crossover if below piston directivity.
Horizontal to 100 degrees pretty easy to do.

Appolito wont make horizontal better or worse
than any other vertical mounting.
The crossover dictates what it does.

The problem is vertical.
And appolito pretty much makes center
to center spacing = default more horrible.
Or lowers the crossover to some impossible
value for most tweeters.

Same with oval speaker.
Horizontal is easy.
Youd use the smaller cone area
for vertical.

But as mentioned.
The mounting rings are too big
anyways to take advantage of it.
So= who cares.

Distortion would have to be amazing
to justify the cost then.
And if the low frequency distortion is improved.
Then it justifies whatever low frequency crossover is needed
for whatever horrible center to center spacing people think
is magical