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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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The 4 sections are done. The last one is not glued yet. The reason what we assemble the section and then glue them is because the section have complex 3D geometry with all 4 sides are under specific arc. Yes, that is right – even the side of the horn...
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[quote user="Joe Roberts"] The L-9 enclosures were wood on all sides. Sealed box. No ambiguity here.Wings were common on theater speakers for mid-bass reinforcement. Plainly audible improvement on these and, for example, A-7/A-5 VOTs. It is equivalen...
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I am not and expert in wood construction, all the building we do around here is brick and mortar, but, If you get the Horn wall close to the roof you could fill that space up with that spray expanding foam. The side of the Mid bass horn will be sti...
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I would never believe that I would face this problem. My carpenter measured up all my space and give me a verdict that he can put in there two mouths 4 by 6 feet with a foot and a have between them. That is it and that was exactly what I would like t...
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Hi Guys,An idea I've had for damping thinner horns in a more or less aesthetically pleasing manner is to house the horn in a Sonotube rigid cardboard cylindrical concrete former, and then apply the desired damping material inside the Sonotube.&n...
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Kea Audio, Regarding the driver. When I meant hard suspension I meant low excursion. Acoustic pressure equals displacement by volume and displacement equals surface by excursion. In horn we add the horn EQ, so for a given frequency we might have lowe...
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There is a popular myth that all horn people in one way or another subscribe to. They believe that reflections from higher frequency horns off the bodies of lower frequency horns is unavoidable destructive price to pay for horns time aliment.
This ...
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I see some posts predicting that the use of bronze for the Mid-Range horns (see photos above) would result in ringing... Well, I respectfully beg to differ; I think this is one area where the designer may have done well... Too bad he polished them.
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[quote user="haralanov"]Ironically or not, I have no practical problems with it, simply because I’m not using big UB horns. My upper bass channels are much more compact – 4 very massive 15” drivers with no horns. Their integration to my main widerang...
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[quote user="haralanov"]Come ooon, comparison between the radiating area of direct radiator vs. the area of horn’s mouth is too amateurish even for some diyaudio.com level simpletons… It is as naïve as saying Leonardo’s Mona Lisa is simply 100 grams ...
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Bill, the result you or anybody else gets with resonating surface of the horn if NOT what I was talking about. You and Jessie recognized in what I was saying some specific problems of your horn but those problem are from very different reason. The t...
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I was pointed out to the fact the Magico has a new idea of their 5 way horn-loaded speaker. I did review the Magico former 4-way project, it was very bad:
http://www.goodsoundclub.com/Forums/ShowPost.aspx?postID=2103
The new one l...
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[quote user="Romy the Cat"]I am more and more inclining to finish my horn in the textured paint of the color of my room. However, lately I have another “idee fixe”. My listening room has a very pleasant light pattern, something that was here before a...
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before you try to "drag" the horn across elevated "forks", whether or not you "carpet" them.This dragging and positioning issue is why I suggest a stable temporary "resting place" set at the correct elevation. This way you can safely and "easily" ef...
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About the 1250Khz secondary resonance: Romy wrote:"...My MF channel is crossed well above secondary resonance – at 3200Hz... I get my 1000Hz by gliding the filter-declining slope of the secondary resonance..."I know this... What I'd really like to s...
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[quote user="haralanov"] Take a look at the video: [/quote]I am not sure why you keep bringing the Vengerov’s video again and again. It is quite banal things and those infomercials of Vengerov educating in front of camera the sentimental girls ho...
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"Gargoyle, YMMV, but I
associate LF propagation/amplification with mass; there has to be some
way to really "anchor" at least the LF driver. "Noted"I was thinking MF for
the felt and/or paper horns, although I guess you could begin with a
chi...
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Electronluv,
I decided do not spoil the “Who built horn” thread what juts was an announcement of availability of different horn boulders. I also did not want to continue the following thread:
http://www.romythecat.com/Forums/ShowPost.aspx?postID=26...
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jd: Looks very ..cool! I can't wait to see some more photos!Romy wrote:"1) You might not need rubber gaskets at back chamber of your mid-bass horn. "-I was thinking the same. But perhaps rubber rings can be used to seal the back chamber to make ...
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Paul,After looking at some photos of Stock Altec horns, though they appear reasonably stout, I can believe they would still resonate when excited by sound pressure alone, as they are still on the thin side if left as bare metal.See them here : http:/...
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Paul,Well it would be silly for me to insist that I'm absolutely correct here, as I too am only basing my analysis only on what I see, and what experience I have been able to amass (some profession-related, a little in...
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[quote user="jessie.dazzle"]Why no amount of watts will compensate for direct-radiation :Start with the obvious : When compared to either multiple direct-radiating drivers or a single horn-loaded driver, to achieve the same SPL, a single direct-radia...
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Romy wrote:"...The material itself – what to use. I am wide open from any type of wood to synthetic panels (like cement panels). Perhaps it might be a combination of organic and synthetic layers..."I realize you won't be doing the work yourself, but ...
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Yes, my idea is not just optimistic but unrealistic. Returning to the question of technology for mass horn production, what about having an armature made of a coiled steel ribbon, the coiling being perpendicular to the plane of the ribbon. Thus the c...
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They paid attention to time-alignment, good - but the tweeters location near a large reflective surface might be problematic.It looks like a 1kHz tractrix horn to me (maybe 800Hz). I have one though it's from Stereo Lab....
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I see, this is very different question then you initially posted.
Ironically the subject was discussed years back what I was fighting with S2’s “fuzziness” at very top.
I still do not feel that there are any 'rule of thumb' in it, there are...
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Ronnie wrote (and posted the following image): "...I was thinking the same. But perhaps rubber rings can be used to seal the back chamber to make it instantly tune-able (without the hard foam)..."Romy wrote a thread called the "Practical Guide t...
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hi jessie!why you dont make it from carbonfiber on a foambase? carbonfiber is much easier to work than glassfiber and of course gives stiffer boards. im also just working on a "surfboard" horn, but i make the bent sides with layers of depron boards a...
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its still expensive, but birch-plywood is not that much cheaper. its around 30-40 €/sqm. the only experience i have with a carbon-foam composite is from making a skateboard for my gf´s son. looks very good, but whats more important, ab...
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And now, going back to page 2 of this thread; here we pick up with some shots of the upper bass horn and the associated primitive "tooling"Mold without coreMold with core. Before core is put in place, mold is loaded with a thick coat o...
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