Really over the top Russian DIY speaker...

Wolf

http://audioportal.hi-fi.ru/showthread.php/62026-АС-quot-Параболоид-quot

Wow...

Wolf

Gowa

Holy makerana!

isaeagle4031

That's incredible. Wish I could read it lol

Kornbread

Google translate addon 

stephenk9

So should we expect Javad to be inspired and try one?

R-Carpenter

It's an interesting project. More challenging in the area of 3D modeling. CNCing is fairly straightforward but arriving to the correct 3D model is
 difficult.
Applause.

jr@mac

Ambitious, not necessarily by aesthetic however.