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Old 23rd May 2012, 05:09 PM   #411
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Originally Posted by mwmkravchenko View Post
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.
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Old 23rd May 2012, 05:11 PM   #412
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Originally Posted by gentlevoice View Post
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.
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Old 23rd May 2012, 05:11 PM   #413
Mark Kravchenko --- www.kravchenko-audio.com
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Fair enough. If you don't ask you don't get an answer.
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Old 23rd May 2012, 05:24 PM   #414
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Originally Posted by chinsettawong View Post
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
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Old 23rd May 2012, 11:45 PM   #415
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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.
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Old 19th July 2012, 05:41 PM   #416
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Default HE 90 size ...

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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.
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Last edited by gentlevoice; 19th July 2012 at 05:43 PM.
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Old 21st July 2012, 02:59 PM   #417
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Oups .. a comment to #416 ... I would have written Wachara as your name instead of chinsettawong - sorry about that ...

Best regards,

Jesper
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Old 21st July 2012, 06:17 PM   #418
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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.
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Old 21st July 2012, 08:08 PM   #419
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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
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Old 18th September 2012, 04:05 PM   #420
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Another pair of headphones is finished. This time I put some engravings on the wood.

Click the image to open in full size.
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