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Old 8th February 2013, 06:42 PM   #41
OscarS is offline OscarS  United States
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Join Date: Jan 2011
Originally Posted by flowwolf View Post

Thanks for pointing out the differences.

I wish i could be

I did the modeling for the JBL wgti. In order to model the system right, it would be great to know how the structure looks like actually. This is just an approximation:


This is the BL curve given by FEMM:

And the BL curve given by my app: (pretty much the same)

And here are those curves I was talking about: (see post #20 3rd image)

Well, anyhow the wgti series sound, the BL curves look like these. I found contradictory information on the web some stating that wgtis have straight curves and others that it doesn't. Actually I don't know anymore

p.s. The coils were connected in series.

Thats actually a very good approximation of the internal structure of the mobile audio DDD motor. Although, I have no idea why the BL curve differs greatly than the model where the coils are more outer-hung.
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Old 8th February 2013, 09:57 PM   #42
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Location: Toronto and Delray Beach, FL
Originally Posted by 454Casull View Post
Since 1956. Well, I wish health and happiness to you and yours, I suppose.
Thank you...... I suppose.

Not just still alive, but alive and still learning.

(Some of those years were spent at the famous Bell Labs in Murray Hill, New Jersey.)

HiFi aspirations since 1957. Currently working on motional feedback again... the final frontier in audio
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Old 9th February 2013, 12:26 AM   #43
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Dan I am going to track one of those down is on my list.

Split coil below.

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Old 9th February 2013, 01:26 AM   #44
NEO Dan is offline NEO Dan  United States
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Location: N.E. Ohio
Hi Josh,
You might inquire about a review sample of the Revel Rythm2:
Revel engineers created a state of-the-art 18-inch transducer using the most-sophisticated FEA modeling

Click the image to open in full size.

Last edited by NEO Dan; 9th February 2013 at 01:28 AM.
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Old 9th February 2013, 02:55 AM   #45
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Might be a possibility.
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Old 11th February 2013, 11:06 PM   #46
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The link might be broken, here is a fixed one.

an (open) account can be created, if someone desires.

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