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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Very many thanks for the link: I shall take a look. I know you have built tapped horns yourself, JLH, but have you tried the synergy horn approach and seen how it compares with conventional horns? Danley's kit seems to be targeted at large venue high...
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Perhaps I misunderstand the unity horn, but I did not mean my suggestion to depend on summation: the idea simply is that one horn flows directly into the other, rather than being discrete; you could have the bottom or top half alone. So the profile i...
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One of the problems with horns is the inflexibility of frequency cut-off: you are limited to a discrete number equal to the number of horns you have. This makes experimentation difficult without having an absurdly large array of different hor...
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Many thanks, Romy, will try it out and report back in a week or so.Regarding using a rack as a frame: it is good for prototyping as it is so flexible. Indeed, even aluminium is fine, because one can mass load it simply by mounting a 2U or 3U ...
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Apologies for blurredness: room is very dark hence long exposure times.At listening level. Note the driver is off, hence light at the centre.Side view. Note the larger horn can move in the horizonal plane to time-align it with the S2. Back chamber is...
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Hi Romy,Many thanks: the answers are...1. The tweeter I thought could go below the MF.2. The room is 5m x 5m x 3.6m.3. Given size of room, corner location would be most practical.4. LF will have to be compact, hence tapped horn appeals.5. S2 diaphrag...
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Here is a homage to the Macondo, or at least two channels of it - 400Hz tractrix with S2 and a 140Hz tractrix with Fane 8M. A T350 for HF and an as yet undefined LF solution is to be added. The horns are from Stereo Lab, with the la...
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It is a pity you can't be persuaded to get an OEM like http://www.meixingaudio.com/ to make the Melquiades commercially for you. Perhaps it might be possible when Jessie starts making the Macondo......
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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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Yes, I should have said modular like your bass horns, but with much smaller segments, e.g. 36 segments of 10 degrees. Assuming one keeps the profile the same, the only difference between different sized horns is scale, so a single mould "capped" at v...
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Jessie, if it is any encouragement you would have at least one client.Would it not be much less difficult and expensive to produce horn moulds if each horn was an assembly of identical sub-components? The idea is to segment the horn longitudinally in...
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Apologies for DIY flavour, but what, I wonder, do people make of the following technique for damping relatively thin-walled large horns, in pseudocode...For horn length x = at throat to at mouth Take a length of y mm diameter braided cable sleevi...
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While on the subject of transformers, nice-looking R core power transformers can be obtained directly from www.dibao.com. Unusually, there is no minimum order....
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Tribute can do all the transformers and the chokes you need: just send him the circuit and specifications, which he has in any case seen before. So can Nicholas, from http://www.promitheusaudio.com/, perhaps less expensively, although it might take a...
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Fantastic idea, but then you would need two drivers per channel, no? ...
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Romy, I know you despise DIY, but isn't this so obscenely simple to build one may as well try it? Presumably, all one needs is a length of large diameter cylindrical pipe, with a partition running down the middle? If one uses two pipes of slightly di...
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Hi Jessie, very many thanks for the info: looks like it should be easy to source in the UK, indeed their website lists several UK projects....
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Lots of bs on their site, I agree, and the spanish product would clearly be very much better. I was wondering, though, what one might use on the inside of a round horn where one cannot easily put in thick materials. There a paint of some sort would s...
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Very many thanks, Jessie.Presumably damping the interior may also be desirable where the horn is quite thin. I know there has been a lot of discussion on this site about the right quality of paint, but mostly in the context of heavy MDF horns. What i...
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jd, may I ask what is the name of the damping material you refer to? I am stuck trying to find a suitable damping material for a 140Hz horn. Another option that comes to mind is heavy rope: simply wound tightly round the horn. Something natural like ...
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What is the reason for not building one's own? There is nothing special about computer power supplies, is there, one just has to provide DC with the correct parameters, no? You could run a motherboard off the Milq......
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I am also interested: please email my username as spelt above @boltblue.com...
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Thanks, Jessie; for the benefit of others here I can confirm pulse-racing are excellent, just as Pete found. They still have his CAD file, so if you are happy with the bolt placement no need even to send them a drawing.What is definitely not excellen...
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It is this section, labelled "Pressure drivers", that caught my attention...http://www.vitavox-sound.com/PressureDrivers/tabid/134/Default.aspx"Still to be done" is not exactly encouraging, but does hint at promise. But if the serious audio part of t...
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What are we to make of this: http://www.vitavox-sound.com/ ? Or am I a long way behind the news....
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Thanks, Jessie. I will try something like what you describe if I fail to find another 8M. I suppose since I have one, I can make some kind of comparison, although mono is clearly not ideal. Hopefully Romy is right about the availability of 8M and I w...
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Hi Romy,The horn is 140Hz, tractrix, with a 4 inch throat. I am certainly not looking to improve on the 8M, in fact I have one driver already, but have not been able to find another for many months, at least the usual places. Where do you see them cr...
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Since the 8M is now no longer to be had anywhere, for love or money (delighted to be contradicted on this), would people care to suggest alternatives for precisely the use Romy puts it to: driving a round, 3-4 inch throat, upper bass horn? I know it ...
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An irrational dislike of MDF drives me to other materials. This, from http://www.cfoam.com/, seems promising, and is theoretically cheap, though whether or not one can persuade them to CNC something for less than the price of an entire orchestra is h...
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Very many thanks, Romy, the idea of someone else's doing it does appeal. I shall split the AC and DC in any case as you suggest. ...
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