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Old 22nd August 2013, 08:38 PM   #281
Dave R is offline Dave R  United States
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Cal,
I've been looking at the "Now you can" Cornu thread. (made it about 1/3 of the way so far!)
Which drivers did you end up using in your Cornu's?

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10th Annual Vancouver Island diyFEST 2013

Quote:
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1. the little cornu that could!
and
3. Cal's larger Cornu
I found some of the Aura 3" / 16 ohm drivers. Did you try that one?
Would a different size or spiral help out different drivers?
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Old 25th August 2013, 05:49 AM   #282
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Hi Dave,

Yes, I tried 6 different 3" including the really cheap and the mid priced Aura's. The LG's came in first and the JVC's came second IMHO. My BIL up in Prince Rupert now uses the midpriced Aura's in his. The small speaker is a spiral, not a Cornu shaped spiral.

The large *** kicking bass units are a Cornu style with the Fostex FF125WK and the full complement of planet10 treatments.

I would not make a regular spiral again as I think the bends in the Cornu horn help to damp the higher frequencies.
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Old 25th August 2013, 06:02 AM   #283
Dave R is offline Dave R  United States
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thanks for the info Cal.

I think I'll make a pair and use them in my shop space. Looks like a fun build, and the output certainly puts a smile on everyone's face. This could be the biggest "Bang for the buck" speaker project ever.
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Old 25th August 2013, 06:07 AM   #284
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I think one of the Fostex's that does the high end better might be well suited to this as it really is a bass cabinet when you get to the 27" size.

Yes they are a fun build. The funnest I can remember.

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Old 26th August 2013, 11:29 PM   #285
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Quote:
Originally Posted by Dave R View Post
This could be the biggest "Bang for the buck" speaker project ever.
You know Dave, you might be right. That plus the fact it's one of the lightest speakers of that volume, makes it that much more fun.
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Old 27th August 2013, 04:11 PM   #286
howardg is offline howardg  United States
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Default Cal with his Cornus at DIY FEST

I thought this pic fun for both threads-I also posted it to the cornu thread. Pretty sure the drivers are the Fostex FF125WK with Planet10 mods

CIMG1233.jpg

They had a lot of bass considering driver size, they must be really bass-ful on a wall.

I remember wondering if they would benefit from thicker front and rear baffles. I thought that the baffles were vibrating/radiating. If that is the case, the sound would be different with thicker baffles.

I can see how the 3/8"(9.5mm)"underlayment"(that's right, Cal, isn't it?) baffle material would be dense compared to its foam-core precedents.
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Old 27th August 2013, 04:33 PM   #287
howardg is offline howardg  United States
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Default A shot of Cal's foam core cornus at DIYFest

CIMG1227.jpg
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Old 27th August 2013, 04:38 PM   #288
howardg is offline howardg  United States
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Default TEDDY BEAR PICNIC

Dave D, Dave R and Cal
CIMG1232.jpg
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Old 27th August 2013, 04:44 PM   #289
howardg is offline howardg  United States
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Default An unusually relaxed Chris

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Old 27th August 2013, 04:44 PM   #290
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To answer Howard, here is the build thread for the Cornu's.

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