http://www.carbidedepot.com/formulas-trigright.asp

I am ready to pull the trigger on the Alpair drivers, but not until this question can be answered.

 We could be on different pages here. When I receive an order for a project (such as when I built the K-horn folded bass horn), angles were part of the print/instructions. Not that there weren't trial and error pieces being used, but you had more than a ballpark idea of say, a 19 1/2 degree angle, or my favorite in the K-horn, 4 --- 79 degree angles to cut. If the information makes it easier than using a trig calculator, why not just supply it?
I am thinking each of us constructs our projects from a different angle of logic (no pun intended!). In my case, some instruction orders that piece be cut at a 12" length, 7" width, with a 45 degree angle on one end, and a 33 degree angle on the other end, FOR WHATEVER reason. Then when these pieces are cut, assembly can start. That is the way that I think anyway.

Ah the days when CAD monkeys were king. Me, I never got much past Jr. high drafting. Good up to a point. After that, you have to give it to a monkey.

  Thanks a bunch Donnie..... NOW I can order the drivers.... unless of course, the DNA2 comes out in a kit and I 'have' to own it.

  Drivers Ordered!