Sorry, checked the wrong forum
anyway, you guys lost me after page 2, as i said I don't know any theory surrounding speakers but i found a project. (and i'm going to do some fullrange-reading when i get the time)
The Heruka:
http://audio-resolution.com/zhorn/
But since i only can get ahold of 18mm plywood instead of 19mm i quess that it will have to do (shouldn't be any problem, right???)