BL distortion prediction / analysis in subs

[OscarS]

OscarS,

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:

flux:

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. 😕

 

[bentoronto]

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.)

Ben

 

[Josh Ricci]

Dan I am going to track one of those down eventually...it is on my list.

Split coil below.

 

[NEO Dan]

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

An externally hosted image should be here but it was not working when we last tested it.

 

[Josh Ricci]

Might be a possibility.

 

[flowwolf]

The link might be broken, here is a fixed one.

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

Regards,
Akos