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Old 10th January 2013, 06:33 PM   #11
xrk971 is offline xrk971  United States
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Quote:
Originally Posted by Scottmoose View Post
That helps.

I'm hardly an authority on horn design though
Au contraire...
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Old 10th January 2013, 06:34 PM   #12
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Quote:
Originally Posted by xrk971 View Post
and some of the resources that George (@gpapag) gave on the Dinsdale papers:
Note that althou a very good basis, Dinsdale's papers have some holes in them.

dave

PS: when i did those scans 10+ years ago i never expected them to spread so far.
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Old 10th January 2013, 06:41 PM   #13
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Like mushrooms.
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Old 10th January 2013, 06:42 PM   #14
xrk971 is offline xrk971  United States
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Note that althou a very good basis, Dinsdale's papers have some holes in them.
far.
What might the holes or errors in the Dinsdale papers be?
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Old 10th January 2013, 06:46 PM   #15
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I can't remember.... i 1st read the paper over 30 years ago ...and have consumed so much since it is a blur.

dave
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Old 11th January 2013, 08:28 AM   #16
xrk971 is offline xrk971  United States
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Quote:
Originally Posted by Scottmoose View Post

I'm hardly an authority on horn design though, unlike some people here who've forgotten more than I'm ever likely to know. However, FWIW, from my POV, while the Vifa is a good driver for what it is, it's not all that ideal for horn loading. You can, but the useable horn-loaded BW is really only between 83Hz - 188Hz.
Ok, if I want to try a relatively low cost driver that is in the 4 in range that is more suitable for horn loading, which would you recommend? A CHR70? Or an FF105wk? What about a Fountek FE85 which although is only a 3 incher has a similar cutout to the Vifa and is about the same price?

Last edited by xrk971; 11th January 2013 at 08:30 AM.
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Old 11th January 2013, 10:37 AM   #17
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I'd take the latest CHR over the 105, since it's somewhat happier producing LF. The Fountek is a 3in, therefore if sound quality is the favoured option, I wouldn't try to get any LF out of it. You can do it, but it won't thank you for trying.
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Old 11th January 2013, 11:22 AM   #18
xrk971 is offline xrk971  United States
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Scottmoose,
Thank you for the recommendation on the CHR-70. Is there any difference other than color between the silver brushed metal and the champagne colored one?
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Old 11th January 2013, 04:06 PM   #19
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No. The data sheets are identical aside from colour.
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Old 12th January 2013, 03:08 AM   #20
xrk971 is offline xrk971  United States
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Thumbs up Update: Stereo Finally

My order of Vifa drivers arrived today and I finished the final assembly and adjustment of stuffing in the second foam core horn. I put in my test CD's, put the FH3-inspired foam core horns about 3 ft from the wall and 7 ft apart with a little toe-in, put a chair about 10 ft away, sat down and listened...

So here are my impressions of these foam speakers: Wow! They sound really good! As expected, they excel at jazz, vocals, and pop. I tried some rock and they are pretty good there too - there is some surprising bass from a tiny 3.5 in driver. The spatial imaging is superb, I could pick out each instrument and its location on the stage. And there was something new and unexpected: I could hear something that I never heard before on a certain track that I listened to all the time. It was the sound of the brush of the drummers hand against the rim of the drum as he was swishing the stick around on the drum head. Pretty cool stuff. Anyhow, the detail that these Vifa's have still manages to surprise me. I will have to listen some more as I have not had a chance to crank it up loud as everyone is asleep, but so far, this build has exceeded my expectations.
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