JBL lens calculator

[jzagaja]

Does anyone know JBL lens calculator or detailed drawing?

http://www.jbl43.net/img/lenses1.jpg

[grumpy]

what?

I think I posted a printable/scale "plan" some time ago...

Ah, here:
http://audioheritage.org/vbulletin/s...5&postcount=63

The Kenrick units were nice enough for me not to bother with DIY 2308's
further.

[jzagaja]

Thanks! Maybe some relevant patents?

[Mr. Widget]

Thanks! Maybe some relevant patents?

I believe Western Electric/Bell Labs did the initial work back in 1949.


Widget

[Hoerninger]

Here you can find a compilation of some literature:
http://audioheritage.org/vbulletin/s...34&postcount=6
Your shown lens is a path length delay element. It is calculated similar to lenses in optics (geometrical optics).
____________
Peter