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Old 13th December 2012, 12:24 AM   #641
xrk971 is offline xrk971  United States
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Quote:
Originally Posted by Cal Weldon View Post
Hate to say it but I am already thinking of my next build.
GD you xrk!

It something along the lines of Cornu that I designed many moons ago and it is spelled *uck. If you're Canadian you'll have no trouble with the first letter.
Luck? Yuck? Muck?
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Old 13th December 2012, 12:24 AM   #642
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Originally Posted by planet10 View Post
the local Dollarama has foam-core for $1.25/sheet.
Speaking of speaker genius', this guy has brought me into the 90's. He'd like to take me further but he realizes my brain doesn't absorb like it use to so he just shakes his head at me for the most part.
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Old 13th December 2012, 12:25 AM   #643
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Think Hockey dudes, I said Canadian didn't I?
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Old 13th December 2012, 12:26 AM   #644
iko is offline iko  Canada
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7. Allows you to tell your buddies that you live with a couple of curvy ones!

Edit: boy you guys move fast! By the time I write a sentence you write the history of speaker design according to Cal!
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Old 13th December 2012, 12:28 AM   #645
xrk971 is offline xrk971  United States
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Originally Posted by klampykixx View Post
Could the spiral in the cornu be squared out and still have similar bass response but better fultration of higher frequencies ? Or is a round/curved horn always better
This was exactly my thinking when I designed my first Cornu based on my hand drawn plan - I made the internals square and round on the outside for looks and better efficiency. You can probably make the whole thing without a curve - all rectilinear and it would sound different. So, when are you going to give the spiral a try? We know you are pretty handy with a razor and foam boards!
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Old 13th December 2012, 12:35 AM   #646
xrk971 is offline xrk971  United States
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Quote:
Originally Posted by Cal Weldon View Post
Think Hockey dudes, I said Canadian didn't I?
Cal,
I am already there with a round one, plan drawn.... need to buy more foam boards I was actually intrigued by the big suspended horn by KoHo called Zen Acousta. That looks like a fun build with foam and plywood....
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Old 13th December 2012, 12:41 AM   #647
xrk971 is offline xrk971  United States
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Originally Posted by surface tension View Post
I'm in. Waiting on Vifa drivers from PE. Built the first 20" spiral yesterday, it took about two and a half hours start to finish. Second one will go much faster.
Do you have first sound yet?
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Old 13th December 2012, 12:43 AM   #648
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Quote:
Originally Posted by xrk971 View Post
Cal,
I am already there with a round one, plan drawn
Show us please. Mine from moons ago is not a spiral but of course it *uck shaped. I am not near that drawing but will share when I can so you can tell me how wrong I am. It starts as a 4' round ply and doesn't need foam board as it's more of a TL opening to a straight sided horn. Maybe I will try a quick sketch. This is dependant on when my wife gets home and I have to be the man about the house again.
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Old 13th December 2012, 12:56 AM   #649
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Originally Posted by surface tension View Post
I'm in.
I am really looking forward to your results.
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Old 13th December 2012, 01:30 AM   #650
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Default Fibonacci Horn

Quote:
Originally Posted by Cal Weldon View Post
This and many other designs are gathering dust in a box somewhere.
Anyone want to go at this one? Only one horn length, could be a pentagon, or a circle. Mouth needs some detailing

Click the image to open in full size. Click the image to open in full size.

dave
Attached Images
File Type: png smooth-spirals.png (12.6 KB, 750 views)
File Type: png spiral-development.png (19.8 KB, 745 views)
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