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Ever think of building a Cornu Spiral horn? Now you can!
Ever think of building a Cornu Spiral horn? Now you can!
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Old 12th February 2018, 12:14 AM   #2451
bonjonno is offline bonjonno  United States
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Those look phenomenol Cal. Where do you plan to mount them? I've only picked up the last few pages, what is the driver u are using and is it contained in the box or is there a bump?

I built a pair of 16" Cornus last year with 2.5" Dayton drivers for my TV; every time I turn them on it makes me smile they're so bassy.
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Old 12th February 2018, 12:28 AM   #2452
scott68 is offline scott68  United States
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Yeah, that is what I was worried about - Since I haven't seen anything like this, I was questioning my "tangent" idea. However, I thought there might be some reasoning in this idea since the Cornu has two different lengths starting with two small channels expanding into a horns (small to large channel.) So why would it not work in reverse with two large starting channels going to tapered small channels, ie, T-Line.


Unless someone gives me some encouragement that it might work and help with the starting info that I outlined above, I will continue with my portable DOT video project. I just finished my 7 speaker, computerized DOT video artwork wall system. I like to have two projects going at the same time or I get bored.
thanks
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Old 12th February 2018, 12:30 AM   #2453
Cal Weldon is offline Cal Weldon  Canada
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Ever think of building a Cornu Spiral horn? Now you can!
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Originally Posted by phivates View Post
Cal doesn't do anything one could call "absolutely nuts."
You're right Fred, it's a 'controlled nutiness'

My wife has other words for it but I can't use those here on this family oriented site.
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Old 12th February 2018, 12:37 AM   #2454
phivates is offline phivates  United States
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Ahhhh...."You're right Fred..." my wife doesn't say that all that often...thank you Cal!
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Old 12th February 2018, 12:41 AM   #2455
Cal Weldon is offline Cal Weldon  Canada
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Ever think of building a Cornu Spiral horn? Now you can!
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Originally Posted by bonjonno View Post
Those look phenomenol Cal.
Thank you.
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Where do you plan to mount them?
In the storage area with all the rest. No kidding, as a speakerholic, this just feeds an addiction.
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I've only picked up the last few pages, what is the driver u are using and is it contained in the box or is there a bump?
TB W6-1139 woofer. Tang Band W6-1139SI 6-1/2" Subwoofer
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I built a pair of 16" Cornus last year with 2.5" Dayton drivers for my TV; every time I turn them on it makes me smile they're so bassy.
These will give me the giggles too. I just hope they don't give me the ****s part. Every time I step up in size, they continue to amaze. I am expecting no less this time.

Here's the 20's, 27's, and 36's along with a drunken concoction I call the Penthorns
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File Type: jpg IMG_2023.jpg (231.6 KB, 304 views)
File Type: jpg IMG_2863.jpg (146.9 KB, 306 views)
File Type: jpg IMG_1236.jpg (85.8 KB, 299 views)
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Old 12th February 2018, 12:49 AM   #2456
Cal Weldon is offline Cal Weldon  Canada
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Ever think of building a Cornu Spiral horn? Now you can!
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Originally Posted by scott68 View Post
So why would it not work in reverse
Well, this is a Cornu thread. To reverse it makes it a whole new speaker. Nautilus comes to mind.
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Unless someone gives me some encouragement
I encourage you to do it. I also encourage you to start a new thread so we can see the progress as we do here in the Cornu thread. Working with foam core is fun. Seriously. I don't mind the accidental blisters at all. Yes, it happens, don't kid yourself.
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Old 12th February 2018, 01:01 AM   #2457
Cal Weldon is offline Cal Weldon  Canada
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Ever think of building a Cornu Spiral horn? Now you can!
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Originally Posted by phivates View Post
Ahhhh...."You're right (Cal)
Happens mostly when my wallet does the talkin'
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my wife doesn't say that all that often
See above. I don't think we're alone here Fred.
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Old 12th February 2018, 03:23 PM   #2458
bonjonno is offline bonjonno  United States
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Thanks for addressing all my questions Cal. And for the pics. Mmmm. Pictures. I get the speakerholic bug from time to time. Luckily don't have it at present. Too cold to think or feel anything this winter :0 In fact I've had the parts for dual TC9 0.53X Karlsonators sitting here for months. Finally a coupla weeks ago I cut out all the foamcore pieces. Now at least they're in a neat stack. But of course I have a few glorious foamy boxes to listen to already, so no rush. When the fever hits again I may take on a 27 or 36 Cornu. I can imagine that the sound out of those things is somewhat beefy. Thanks for the inspiration.
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Old 12th February 2018, 05:52 PM   #2459
Cal Weldon is offline Cal Weldon  Canada
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Ever think of building a Cornu Spiral horn? Now you can!
I wish strokes of genius would interrupt my thought process more often. While I'm lying in bed this morning, trying not to disturb the Mrs., it hit me. If you want to lay 46 ft. of glue on the edge of the foam before it skins over, you either need four people with a bottle of glue or you do something like this. It's just a paperclip taped to the nozzle. Hockey tape of course.
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Old 12th February 2018, 07:07 PM   #2460
xrk971 is offline xrk971  United States
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Ever think of building a Cornu Spiral horn? Now you can!
Nice one, Cal. The super duper (patent pending) guided glue nozzle!

You could have a bottle of fine spritz water spray to keep glue moist while laying the bead down. Or use PL Premium (slow setting water activated) and spritz water on it before putting the top panel on.
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