angelaudio Posted May 31, 2020 Share Posted May 31, 2020 I Googled everywhere without success. Did anyone ever build a scaled down Klipschorn like a 1/2 scale or 1/3 scale? Quote Link to comment Share on other sites More sharing options...
Schu Posted May 31, 2020 Share Posted May 31, 2020 I think I remember seeing one years ago that was home built... the issue being that while the speaker can be scaled, the wave lengths can not. 2 Quote Link to comment Share on other sites More sharing options...
Edgar Posted May 31, 2020 Share Posted May 31, 2020 There was a article in Speaker Builder magazine for a Klipschorn-inspired midrange horn. I'll see if I can find the issue. Quote Link to comment Share on other sites More sharing options...
Edgar Posted May 31, 2020 Share Posted May 31, 2020 16 minutes ago, Edgar said: There was a article in Speaker Builder magazine for a Klipschorn-inspired midrange horn. I'll see if I can find the issue. Either my memory fails me after 37 years, or it was in a different magazine. I found an article titled "A 70Hz Mini Horn", by Bruce Edgar (no relation) in the 2/83 issue of Speaker Builder. But I don't think that's the article that I remember. Quote Link to comment Share on other sites More sharing options...
Edgar Posted May 31, 2020 Share Posted May 31, 2020 Ah! Found it. "A Corner Mid-Range Horn", also by Bruce Edgar (still no relation), Speaker Builder 3/80. It's actually more like the Jubilee than the Klipschorn. 1 Quote Link to comment Share on other sites More sharing options...
angelaudio Posted May 31, 2020 Author Share Posted May 31, 2020 Interesting! Is there a picture of it or a way to see the article? Thanks guys. Quote Link to comment Share on other sites More sharing options...
Edgar Posted May 31, 2020 Share Posted May 31, 2020 11 minutes ago, angelaudio said: Interesting! Is there a picture of it or a way to see the article? Thanks guys. https://www.audioasylum.com/forums/hug/messages/16/168480.html What is forum policy on copyright material? I have the magazine and can scan it, but I don't want to step on anybody's toes. 1 Quote Link to comment Share on other sites More sharing options...
artto Posted June 1, 2020 Share Posted June 1, 2020 Here we go again 1 Quote Link to comment Share on other sites More sharing options...
DizRotus Posted June 1, 2020 Share Posted June 1, 2020 FWIW, DIY is my middle name, but I would NEVER devote the time and materials to such a project for the reason stated by Michael @Schu. Neither would I discourage anyone else from doing it. Most people think I’m wasting time and money fooling with audio. Quote Link to comment Share on other sites More sharing options...
kevinmi Posted June 2, 2020 Share Posted June 2, 2020 I think Greg Roberts of Volti Audio did one about 10 years ago or so. Quote Link to comment Share on other sites More sharing options...
pzannucci Posted June 4, 2020 Share Posted June 4, 2020 You use the corner for bass reinforcement. Not sure there is a benefit of the corner when you are doing mids, particularly with the folds which aren't conducive to passing higher frequencies. Probably just a project for the fun of it. Midbass, possibly though again seems to be rather frequency range limited. Quote Link to comment Share on other sites More sharing options...
Bigdnfay1 Posted June 4, 2020 Share Posted June 4, 2020 Wasn't it a set of belles? Quote Link to comment Share on other sites More sharing options...
Davecv41 Posted June 6, 2020 Share Posted June 6, 2020 On 5/31/2020 at 2:29 PM, Edgar said: https://www.audioasylum.com/forums/hug/messages/16/168480.html What is forum policy on copyright material? I have the magazine and can scan it, but I don't want to step on anybody's toes. It looks like @seti made that post on Audio Asylum. Maybe he'll stop in and add a comment here. Quote Link to comment Share on other sites More sharing options...
OO1 Posted June 6, 2020 Share Posted June 6, 2020 On 5/31/2020 at 11:31 AM, angelaudio said: I Googled everywhere without success. Did anyone ever build a scaled down Klipschorn like a 1/2 scale or 1/3 scale? Quote Link to comment Share on other sites More sharing options...
seti Posted June 6, 2020 Share Posted June 6, 2020 1 hour ago, Davecv41 said: It looks like @seti made that post on Audio Asylum. Maybe he'll stop in and add a comment here. Thanks but I was looking for the entire article as well.... Quote Link to comment Share on other sites More sharing options...
moray james Posted June 6, 2020 Share Posted June 6, 2020 On 5/31/2020 at 9:31 AM, angelaudio said: I Googled everywhere without success. Did anyone ever build a scaled down Klipschorn like a 1/2 scale or 1/3 scale? welcome aboard. Just so you know you cannot scale a horn because it is based upon wavelength from a practical point of view if you want good efficiency it needs to be at least a 1/4 wavelength long and wide at the mouth to achieve your desired low frequency cut off. The easiest way to shrink the size of a horn is to start with the largest area woofer you can this will shorten the length but it won't change the mouth size. If you don't mind lower efficiency and a little lighter bass you can drop to an 1/8 wave but at that point a well designed reflex design will probably yield as good or better results with a lot less work. There are no tricks or easy ways around it horns will be big if you want them to play low. 1 Quote Link to comment Share on other sites More sharing options...
seti Posted June 6, 2020 Share Posted June 6, 2020 13 hours ago, RandyH said: I'm sure PWK did it... From Stories told by delgado and other klipsch employees PWK built different size jubilees. We were shown a motor board complete witjh two 6 inch drivers and a passive in the midle. I think scaling the Jubilee would be an easier build. Quote Link to comment Share on other sites More sharing options...
OO1 Posted June 6, 2020 Share Posted June 6, 2020 52 minutes ago, seti said: I think scaling the Jubilee would be an easier build. -----most definitely --the Jubilee was designed with Cad Software and it's logical to assume that the cab could be scaled with drivers ranging from 18-12--6 - -the 6 inch motor board you saw may have been the 1/2 scale factory test bed for the 100% scale Jubilee cab - Quote Link to comment Share on other sites More sharing options...
seti Posted June 7, 2020 Share Posted June 7, 2020 On 6/6/2020 at 11:30 AM, RandyH said: -----most definitely --the Jubilee was designed with Cad Software and it's logical to assume that the cab could be scaled with drivers ranging from 18-12--6 - -the 6 inch motor board you saw may have been the 1/2 scale factory test bed for the 100% scale Jubilee cab - Not sure the jub was designed with cad software.... But yeah easier to scale. Quote Link to comment Share on other sites More sharing options...
JohnA Posted June 7, 2020 Share Posted June 7, 2020 My conjecture: Thinking about this, it looks like the corner is actually an imperfect extension/expansion of the bass horn. There should be a region in a bass horn's area expansion where a 90 degree corner is a pretty good approximation of the mouth area and increases in area for the needed additional area, for a few feet. I'll bet the K-horn size is about that right mouth area. A scaled down K-horn would have a mouth area likely too small and the discontinuity would mean it got less benefit from the corner. Quote Link to comment Share on other sites More sharing options...
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