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

[zayne742]

Cool, Thanks. Looks like it is pretty close to your calculations then, just with an additional layer/divider.

[rock12]

I posted on another thead but this is where I should be. I have the W3-315e(tangbang) in a 24" cornu 4" thick(10.2C) and a throat of 1.6centimeters though in building it came out slightly bigger. Polyfill is new to me where is a good amount to start and how dense of a wad. For some reason posting pics is escaping me is there a certain procedure

[xrk971]

Rock,
I have often considered the W3-315e - nice aluminum cone driver. You can start with just stuffing the driver chamber with a good amount (uncompressed fluffed state about 3x the volume of the chamber). It is easy to adjust to taste. If you think there is still too much coming through the horn mouths you can try adding a very small amount into the throats using a small wire tool to poke and prod it into place. Make sure you leave some of it exposed so that you can pull it out with a hook if it is too much.

Posting pictures sometimes requires using the right browser. I cannot do it in Chrome on an Android but Firefox works fine. The text editing on Firefox sucks so I end up using two browsers to achieve what any single browser in Windows can achieve. You need to go to "Advanced" and choose "Manage Attachments".

[rock12]

your work on this is amazing Building this is so quik and rewarding. I thank you again for all your posts. keep it up it inspire's us all

[xrk971]

Thanks for the kind words Rock. I am glad that I can spread the joys of spiral horns and foam core speakers on this forum, and that people are willing to give it a try. I am glad it worked out for you, looking forward to photos of your build. How does it sound?

[Cal Weldon]

Speaking of spirals, check this out. JRKO posted it in another thread.

[xrk971]

OMG! Is that stage a giant cornu the size of a dance floor?

[Cal Weldon]

Originally Posted by xrk971

Kimbo,
The size room you describe is probably too small for a 20 inch cornu.

Hogwallies! The bigger the better! Don't listen to him Kimbo, his ears are probably in decent shape. Not like those of us who spend their time on the water listenin' to all that whistle blowin' and stuff.

Originally Posted by rock12

For some reason posting pics is escaping me is there a certain procedure

Instead of hitting 'quick reply', use 'post reply' and then go down to 'manage attachments' as X has mentioned.

Originally Posted by rock12

your work on this is amazing Building this is so quik and rewarding. I thank you again for all your posts. keep it up it inspire's us all

So true.

[rock12]

pic I hope. if it works I will update

[Cal Weldon]

Good work.