Here is a pic from earlier today as some 1" African bubinga was being machined into custom horns. The holes you see are where the bolts go through to hold the CNC billet aluminum vanes.
Smith Horn
About the best build of one I have seen.
Aluminum vanes too!
Have you been to this site?
Yuichi's Audio Lab.
Regards,
WHG
About the best build of one I have seen.
Aluminum vanes too!
Have you been to this site?
Yuichi's Audio Lab.
Regards,
WHG
Working on the throat adaptors today. Then have to decide if I just use some Danish oil on them or use a hard finish like lacquer, polyeurothane, shellac, etc... Once they are done, I'll CNC some stands out of the same wood.
Here is a finished set with the custom CNC billet vanes. The wood is just as it was coming off the CNC. It has not been sanded yet. So, it will only get better.
Here is how they go together. They will actually bolt together with inserts in the top half of the horn for the bolts to thread into.
Ok sanding was a lot more of a task than I had anticipated. The very hardness that made machining nice, makes sanding difficult. I ended up using 120 grit on a random orbital palm sander to get the paper to even cut. I then hand blocked a little with some 320. Running your hand over it, you would think it had been finished in 600 grit.
Here is a picture as the first coat of Danish oil was going on.
Here is a picture as the first coat of Danish oil was going on.
Comparing the JBL 2397clone against an Altec 511B, the JBL wins hands down. The mid range is smoother and warmer. The 511B seems bright and edgy that I can only attribute to the undampened aluminum horn.
The adapter is a one off prototype I threw together. It is made from two pieces of 3/4" batic birch. The first has a 1" hole and recessed bolt holes to mount the LE85. The second piece transitions from the 1" hole to a rectangle that matched the horn. The two pieces bolt directly to the horn. The wood is so dense, I drilled and tapped it for 1/4x20.
The adapter is a one off prototype I threw together. It is made from two pieces of 3/4" batic birch. The first has a 1" hole and recessed bolt holes to mount the LE85. The second piece transitions from the 1" hole to a rectangle that matched the horn. The two pieces bolt directly to the horn. The wood is so dense, I drilled and tapped it for 1/4x20.
Thanks David - I do enjoy DIY and the satisfaction of saying, "I made that."
This weeks project is making custom stands for these.
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