I am putting together a driver lineup for a 3-way.
Here is what I have:
E145 15in Woofer
1200hz Smith Horn
076 like tweeter
The 1200hz horn is from this thread:
http://audioheritage.org/vbulletin/showthread.php?t=5454
The 076 horn is something I have been working on. I have a 076 in my 222 disco and like the sound of them. I wanted something to mate nicely with the walnut smith horn, so I decided to copy these in walnut. I doubted my ability to match the oval, so I carefully measured and copied the inside and outside curves from my 076. I then reproduced these two profiles and mitered together a rectangular horn of the same dimensions.
This is built on a 2402 driver so I also had to turn out a phase plug and housing on the lathe.
I was fairly careful in my measurements of the original.
I have tested them out on top of the L222, and they sound the same from what I can tell.
I have located a place where I can take these and the smith horns and have them measured in a professional facility. But it is a little bit of a drive so I want to get a crossover together and test everything at once.