Ever think of building a Cornu Spiral horn? Now you can!

[db6546]

Thanks, guys.

The driver is an Aurasound Whisper. They were $12.50 on sale.

Aurasound NSW2-326-8AT Whisper 2" Extended Range Speaker Driver 8 Ohm

[planet10]

Thanx, similar construction and size to the ne si mentioned.

dave

[db6546]

I started laying out the 20" plans on the bottom plates and didn't feel like poking all those holes.
So I came up with another approach. I laid my plan on the bottom plate and pushed three pins in for alignment. Then I put the pattern on the second bottom plate and pushed those pins in again. Now I can remove and replace my pattern on both plates and keep the pattern aligned.

Then I cut the pattern on the outside line in 90 degree segments. I traced the pattern outline, put it on the second plate, and repeated.

Cut on the outside again in 90 degree segments. Trace again.

Repeat. Once you get past the second set of vanes you can cut in 180 degree segments.

It turned out pretty good. It's more accurate than the hole poking method I used on my first set. It may not make any practical difference, but satisifies my OCD.

[haraldkasper]

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i built these for my wife with Fostex FF125K

[Cindra]

Beauty

[Cal Weldon]

Originally Posted by db6546

I have a pair of RS 40-1354 drivers and may have to try them in a 3' by 5" Cornu.

You will not be disappointed. That driver in that size Cornu is still the finest I have built to date.
Damn the torpedoes, full speed ahead!

[planet10]

Harald,

I have some tricks that help tame the FF125wk.

dave

[Cal Weldon]

What are you taming Dave? I found that driver rather subdued in it's delivery.

[planet10]

Wasn’t yours already worked over?

Stock they have some ringing that takes some tweaks and long brealin to minimize.

dave

[xrk971]

Originally Posted by haraldkasper

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i built these for my wife with Fostex FF125K

Bravo! Nice job. How does your wife like them. The astrology motif is genius. I know lots of people who are into that.