Lens physical explanation

[frablake]

Hi Everybody

Is there anyone would could physically explain to me the principe of the lens used by JBL on 43XX serie monitor.
I have an idear, but i look for theorical and practical explanations.

Waiting to read you!

Kindes regardsfrom France.

Frablake

[pos]

here you go:
http://lansingheritage.org/html/jbl/reference/technical/lens.htm

and also:
http://audioheritage.org/vbulletin/showthread.php?t=22253

[frablake]

Thank you Sir

I m going to read them



here you go:
http://lansingheritage.org/html/jbl/reference/technical/lens.htm

and also:
http://audioheritage.org/vbulletin/showthread.php?t=22253