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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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[quote user="guy sergeant"]One issue that I would consider is that the Tractrix profile supposedly does not lend itself aswell to extremely low frequency horns (being too short) as other profiles in particular the Hypex (Salmon) shape. [/quote]
Yep,...
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The Other End of the Single End: Modern Horns Done With Flare An Interview With Dr. Bruce Edgarby Dave Glackin, printed in POSITIVE FEEDBACK. 1996
Dave Glackin interviewed Dr. Bruce Edgar in his home, prior to the 1996 WCES. A follow-up on the speak...
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Rakesh, I do not know a lot about the audio trivia. What I do know that in the world I live and I understand the tractrix curve introduced Bruce Edgar. I thought that tractrix curve was described by French. The tractrix curve is twisted and not strai...
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Rakesh, I do not know a lot about the audio trivia. What I do know that in the world I live and I understand the tractrix curve introduced Bruce Edgar. I thought that tractrix curve was described by French. The tractrix curve is twisted and not strai...
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Thankfully, JMLC chose to use english as the common language for he event, not altogether surprising given the many nationalities that probably attended.JMLC writes:
"N°13 : Stereolab tractrix horn + Vitavox S2 driver
...
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Hello to all Good Sound Club Members, and special thanks to Romy The Cat.
We are a Polish audio company started in 2011.
For now we have two tractrix horns available - 400 Hz and 600 Hz. Next week we also should have 115 ...
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I have been working on curves for tractrix horns based on data generated by HornCalc software. I configured the software to give values corresponding to radial sections for every 10mm of axial length of a horn nearly 1 meter long. When I plot the cur...
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hi allin germany started a new company selling wood tractrix horn speakers :here the link :http://www.cessaro-horn-acoustics.com/angelo...
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Phil, as I can see most of your horns, if not all of them, in one or other way explore the baby-cheek idea. Are any specific reasons why you employ the baby-cheek so heavily? I know the basic theory about the baby-cheek radiation pattern (something t...
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A tractrix and a exponential horn was compared in a AES paper sometime 1950-1970, I dont remember when exactly.
The two round and straight horns where made with the same theoretical cut off frequency, something like 100Hz, they had the same mo...
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Hello BE,Quotes from BE in blue :A tractrix and a exponential horn was compared in a AES paper sometime 1950-1970, I dont remember when exactly.
Does anyone know where I might get a look at this paper?The two round and straight horns where mad...
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It should be possible to find it hidden away in a technical universitys storage room if they have the AES papers. I could not find it on there website, probably they think it is obsolete.The distortion in a horn is generated by two mechanisms: 1. By ...
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here's the measurement we've got from S3 on tractrix 260 horn.
the increments on the graph are 1db
it seems useful from around 450-500 to some 1.3k, but it still looks very bumpy in comparison with a number of ot...
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http://inlowsound.weebly.comI've not heard this myself but others have spoken highly of it....
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Compared to all the drivers out there,are they respectable at all.Just from my experience over time they sound better when crossed over above 800Hz.But still theres something odd.Am I for the price range of these drivers better off getting something ...
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[quote user="Kerry Brown"] Yesterday a friend of mine brought over a CLIO analyzer and we graphed the impedance vs. frequency. I was surprised that the subhorn measures like a ported box tuned to 50 Hz ! [/quote]Yes, this all is very explainable. The...
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[quote user="Dominic"]Hey, Rom, could you elaborate on the idea of a tractrix being "less intricate"? Seems like an interesting idea, but i don't really know what you mean.[/quote]I can talk a lot about it but to in short: Tractrix has maximum gain a...
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Sorry for the dutch language but I posted my project and pics there....I think the photo's will tell the story...hope you'll like ithttp://www.htforum.nl/yabbse/index.php?topic=112675.0Regards,Arno...
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Of cause your reply does not cover the subject that I was asking, which is fine, I do not mind. The subtle point that I constantly was trying to make (and that looks like escapes from understanding of the people who are afraid to use the term Lecleac...
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Romy,
More to come soon but a couple comments regarding bass horns ( and one on Tractrix horns ) :
The Edgar Seismic subwoofer ( 18" JBL E155-4 hyperbolic-exponential folded horn, 40 Hz Fc ) works very well in my room - much better than the 1...
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First off, let me say Hello to all fellow Audiophiles!
I'm an audio-obsessed 29 year old currently living in the United States (Minnesota), and have spent years perfecting HIFI systems in vehicles, and over...
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[quote user="kodomo"]Here is my response for the Supravox 285-2000 in 110cf tractrix. I designed a sealed chamber and with the qtc 0.707 it is tuned to 160hz. However I hope the modified version will be even better![/quote]I think that Group Delay an...
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Romy, what is your thought on using a Tractrix flare on a Midbass horn, Fc 140HZ then maybe a Le Cleah horn above, say 400hz. To me this looks on paper to be the best of both worlds and avoids the 1metre plus midbass Le Cleac'h horn.I am putting toge...
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Hey, Rom, could you elaborate on the idea of a tractrix being "less intricate"? Seems like an interesting idea, but i don't really know what you mean....
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Hi Jessie.I haven't built anything like the project you are attempting although I have thought about such things. Sadly I don't have the space either! i'd definitely be interested in coming to hear it when its completed & working satisfacto...
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By a second notion:A quarter of a round horn would probably be ideal, it would fitt in the junction between the wall and the floor, and maintain the round shapes double curved better resonance control when compared to the parallel single corved sufac...
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By distortion in the throat I mean distortion caused by the nonlinearitiy of air that manifest itself by high pressures.I dont think this was known in those days.If this makes any significant audible difference in this particullar case I dont know, b...
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hi alli started recently producing MDF Tractrix Horns. Size up to 1m diameter possible. shipping worldwide. prices : 48cm diameter us$600,00 90cm diameter us$4000,00p...
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Hi Romy,I do not know how much experimenting you have done running a compression driver with no LP filter through your 250Hz tractrix. However, in consideration of a given driver employed, irrespective of adjacent channels and by your various criteri...
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[quote user="guy sergeant"]One issue that I would consider is that the Tractrix profile supposedly does not lend itself aswell to extremely low frequency horns (being too short) as other profiles in particular the Hypex (Salmon) shape. [/quote]
Yep,...
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