But don´t you have the depth of the horn, the only thing I can see could change is the mounting plate thickness, and not the horn itself.

That gives a mouth of 12.5" x 25".

Using 11" as the top and bottom with 3/4" wood and 12" x 24" mouth, the depth is 11.09", that´s close enough, so this is how I´ll build them.

I´ll begin cutting wood on monday.

Regards
Kim

When Wayne announced his midrange horns last year, I spent a good afternoon going through my old math books, trying to figure out the angles. You know what I ended up doing? Built a mock up with 1/4" MDF to measure the angles directly off of it. Only took an hour to do the mock up.

With a mock up, you don't even have to "measure". Just copy the angle to a sliding bevel and transfer to the saw.

Gar.

The basic dimensions shown in the plans are simplified, and you'll need to setup cut dimensions and angles for your wood. We have three different jigs for different various wood sizes. The first horn is the hardest, and after that, they go pretty easy. That's why we make flat pack kits available, because we have the production issues nailed down. This makes it easier for DIY builders that aren't setup to do precise angles and what not.

I had converted it all to metric and made a drawing in cad, that ended up making to mouth 63,5cm x 30,5cm, and the depth without mouting plate 26cm.

Now I have a pretty good idea how to make it the next time.

Which will not be in a while, I have to install floor heating and a new kitchen in the house, before I can do some more wood cutting for speakers.