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Old 21st December 2012, 03:07 PM   #861
6L6 is offline 6L6  United States
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I'm making the speaker cut outs on mine right now. Hopefully will have them playing soon!!
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Old 21st December 2012, 03:11 PM   #862
xrk971 is offline xrk971  United States
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6L6 and Bob,
You guys are neck and neck. Who will be the first to FIRST SOUND? The race is on....
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Old 21st December 2012, 04:06 PM   #863
bcmbob is offline bcmbob  United States
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"What He Said" - Simply amazing sound from a tiny 3" driver. I haven't even put anything in the horn yet and just plain got a great big smile as I shook my head in surprise. Any doubts I may have had about the wisdom of investing in some top notch drivers for these have been completely erased.

As in the picture, these are up against my favorite speakers - The Sunflowers - and though they fall short in comparison in the definition and sparkle at first listening, there is no doubt the Cornus could and will provide exceptionally good sound to all who attempt the build.

I am now at about $40 in this project and the Sunflowers ~ $450. It's a no-brainier for anyone wanting great sound at an unbelievable bargain.

I'll be stuffing and tweaking for the rest of the day. Thanks Xrk and Cal for the support and enthusiasm, 6L6 for pointing me to the thread in the first place.

IMO, the Cornus have a very high potential for serious development and a high level of enjoyment for all.
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File Type: jpg Cornu.jpg (118.4 KB, 686 views)
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Old 21st December 2012, 04:08 PM   #864
xrk971 is offline xrk971  United States
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Congratulations Bob!
Another true believer!
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Old 21st December 2012, 04:18 PM   #865
bcmbob is offline bcmbob  United States
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I'm playing this album now and am just floored. The cello's full range from top to bottom is just about perfect. The instruments are placed in the stage accurately and all the resonances of all the strings are beautiful. The hollowness of the instruments can even be heard

SIMPLY AMAZING !!!
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Old 21st December 2012, 04:19 PM   #866
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Congratulations!! They look wonderful. I've seen a vision of what I'm in store for.

By the way, I brought up this design with my audio engineering teacher and he pointed out a problem with the design that could possibly be fixed with little trouble. He noted that the shallowness of the speaker is going to lead to a cancellation around 2k from the bounce off the rear wall. His hunch appears to be backed up by a couple of passages in the 6 moons review:

Quote:
"When the Cornu CS was on display at the Triode Festival 2004, it was equipped with a plastic front horn. Daniel was not secretive at all to reveal that there is a frequency response dip below 2000Hz and that the front horn was meant to remedy the problem acoustically without electronic filtering....

...Said dip was clearly visible in all the measurements I made. Judging from the window of this depression, it could be explained by diffractions and internal cabinet radiation."
The solution, if there is one, might be to simply place a sound-absorbent deflector behind the driver. I might experiment with this.
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Old 21st December 2012, 04:22 PM   #867
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Quote:
SIMPLY AMAZING !!!
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Old 21st December 2012, 04:23 PM   #868
xrk971 is offline xrk971  United States
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Wait till you hang it on the wall! Even more amazing. I am glad this wrked out for you. So it looks like little Vifa works in a 24 inch x 3.5 in thick cabinet beautifully.

Like I said earlier, the cornu's reignited my interest in listening to music again. You hear cd's in a whole new way you never thought possible.
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Old 21st December 2012, 04:29 PM   #869
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The only other speaker box that has ignited so much fun for me with speakers is the Altec 825 known of course for the A7 VOTT. Both of them lend themselves to a wide variety of drivers. This one is a little more, how you say, portable?
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Old 21st December 2012, 04:32 PM   #870
xrk971 is offline xrk971  United States
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Quote:
Originally Posted by chazdrumzalot View Post
Congratulations!! They look wonderful. I've seen a vision of what I'm in store for.

By the way, I brought up this design with my audio engineering teacher and he pointed out a problem with the design that could possibly be fixed with little trouble. He noted that the shallowness of the speaker is going to lead to a cancellation around 2k from the bounce off the rear wall. His hunch appears to be backed up by a couple of passages in the 6 moons review:


The solution, if there is one, might be to simply place a sound-absorbent deflector behind the driver. I might experiment with this.
This explains the nosecone placed behind driver in patent drawing. I made my left and right cornus slightly different: I have a sandwich of foam and plumbers' putty in the back of one. Maybe it will show up in a measurement?

Last edited by xrk971; 21st December 2012 at 04:34 PM.
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