Quote Originally Posted by Cal Weldon View Post
I'll go look again.

EDIT: Found them:

First at post 712 And Now For Something REALLY BIG - Page 18 - diyAudio is the plot and post 716 And Now For Something REALLY BIG - Page 18 - diyAudio has a trace of the curve but as we age we forget things, I now note that is for the 1005 horn and I don't know the difference in length if any. The mouth size is the same.

EDIT2: Looking at the link provided before, they are indeed the same. Don't be fooled by what looks like a 0.5 inch difference. You'll figure out why. So there you go. All you need for a 1505 except the waveguide.

EDIT3: Check this post as well. And Now For Something REALLY BIG - Page 19 - diyAudio
Excellent! That's perfect, Cal.

So let me see if I get this: All cells for all horns are basically the same curve. What defines a 500Hz from a 300Hz is the length of the cell...yes? So you can turn a 300Hz cell into a 500Hz by trimming off the front?