Has anybody made an ELS headphone?

[chinsettawong]

Hi Mark,

I do notice a big increase in sound stage and dynamic from increasing the active diameter from 70 to 80 cm. As far as efficiency, it's not that significantly better.

I'm very interested in your horn loaded ESL. Could you post a link to that, please?

Wachara C.

 

[geraldfryjr]

Yes,I too would be very interested in hearing of your results of a horn loaded Mid/tweet ESL panel.
I truly believe that this could work very well in contrary to others popular belief's.

Cheers !!

jer

 

[Kravchenko_Audio]

It's a planar magnetic driver.

ESL is a bit different.

 

[geraldfryjr]

Oh,Okay !!! he,he,he

Still would like to hear of your results.
Later this year I will try it though after I get my new little panels built.


Wachara,
I can't believe that it has been a whole year now since I had started my Esl Headphone's and have yet to finish them!!

I think that I will use your method of wood to support the frames now that I have finally gotten my stator coating down pat for the wire mesh stator method.

jer

 

[Kravchenko_Audio]

ESL has been horn loaded. But true horn loading is not to friendly to an ESL. The one design I will try it the ESL compression driver mentioned. That looks possible.

 

[geraldfryjr]

I had once thought of using a pair of gold plated CDR's to make a compression type of ESL driver with the exit out of the center spindle holes.

I was thinking of this technique to boost the lower end for a headphone driver as well.
But I have yet to give it a try.

jer

 

[chinsettawong]

Here is another pair that is almost done:

The driver has the same size as the famous Orpheus HE90. They sound really nice.

 

[gentlevoice]

Read this and the similar thread over at DIY Audio and I think I might have to have a crack at a set. Spent the evening on Sketchup and have began designing the stator and spacer.

Ever so slightly ripped off from one of chinsettawong's designs. Do they seem ok so far? They're both 90mm in diameter so you have an idea of scale.

Hi - sounds interesting that you are using sketchup for this. Any chance you can post some pictures of your drawings? And also which file format do you output from Sketchup? I'm interested in drawing headphones myself, however, probably would need an .stl output format - for use with a 3D printer.

Greetings,

Jesper

 

[Kravchenko_Audio]

Willing to make a set ? You are very good at this and me trying to reproduce it would be quite an effort.

I have amp designs on file already. Would be a most interesting adventure.

 

[gentlevoice]

Hi again,

Just out of curiosity - any of you made a single-ended headphone, i.e. with only one stator (could be with two stators but only one of them connected to the output signal)? I know that theoretically it's less optimal (due to varying electric fields when the membrane moves, I understand) but any of you tried it in practice? It would allow for a single-ended amp ....

Best regards,

Jesper

 

[chinsettawong]

Willing to make a set ? You are very good at this and me trying to reproduce it would be quite an effort.

I have amp designs on file already. Would be a most interesting adventure.

A lot of people have been asking me to make the kits, but I just don't have enough time to make them. I'm so sorry.

Wachara C.

 

[chinsettawong]

Hi again,

Just out of curiosity - any of you made a single-ended headphone, i.e. with only one stator (could be with two stators but only one of them connected to the output signal)? I know that theoretically it's less optimal (due to varying electric fields when the membrane moves, I understand) but any of you tried it in practice? It would allow for a single-ended amp ....

Best regards,

Jesper

Hi Jasper,

Even though I haven't tried it, but I figure that the efficiency will be very low.

Wachara C.

 

[Kravchenko_Audio]

Fair enough. If you don't ask you don't get an answer.

 

[gentlevoice]

Hi Jasper,

Even though I haven't tried it, but I figure that the efficiency will be very low.

Wachara C.

Hi Wachara,

Thanks for replying ;-) I'm wondering though - since the membrane is very, very close to the stator I would assume that the drop in the electric field at the place(s) where the membrane moves would be very, very little ... Yet the extra stator adds the double voltage (on the other side of "zero") so might it be that the efficiency loss is 6 dBs (=20*log½)?

Any of you have insights on this?

Greetings,

Jesper

 

[chinsettawong]

Someone has done one stator double diaphragms design and feed it with single ended signal. I think it's an interesting design and I might try it in the future.

Wachara C.

 

[gentlevoice]

HE 90 size ...

The driver has the same size as the famous Orpheus HE90. They sound really nice.

Hi again Chinsettawong,

Now I'm in the process of making a model of the stators for an ES headphone and would like to do make like the HE 90 stators you show in #407. You say that the stators you use are the same size as the ones in HE 90 .. Can you say what the dimensions of the active area is?

Greetings,

Jesper M.

 

[gentlevoice]

Oups .. a comment to #416 ... I would have written Wachara as your name instead of chinsettawong - sorry about that ...

Best regards,

Jesper

 

[chinsettawong]

The width and height of the stator are 74 cm and 114 cm. The active diaphragm's width and height are 60 cm and 100 cm.

Wachara C.

 

[gentlevoice]

Thanks Wachara ;-)

I wonder why they've chosen these proportions ... It looks like an ellipse & the proportion between height and width is close to the golden section proportions (1.618) ...

Just pondering.

Best wishes,

Jesper Mønsted

 

[chinsettawong]

Another pair of headphones is finished. This time I put some engravings on the wood.