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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Hi Kodomo-You have made an ambitious undertaking. Congratulations to a brave decision.Can you please elaborate a little on your TAD implementation. I have used one on each side ,in 3 cuft sealed cabinets, first order from 60 to 150Hz, blending gent...
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[quote user="anthony"]It is a compression driver with an 8" cone. If you want authority at 300Hz you will need diaphragm area. The Fane Studio 8M that Romy and plenty of others use for 100Hz up to 1kHz is an 8" cone driver on a 4" throat with a clo...
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It is interesting that S2 phase plug, if to look at it from throat, ends up with round-head bolt. The head of the bolt has a channel for a flat-head screwdriver. This channel should introduce an asymmetry into a perfectly symmetrical phase plug and i...
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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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With respect to the throat, profile, etc., that's +/- what I expected earlier, germane to the earlier horn tuning in development question. And this seems to suggest that most folks who simply math it and then stay with that result are either lucky, ...
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Plain and simple. This is the very first section, right after the throat. The front compression chamber will be blowing into this first section… Does not look like much, dos't it?
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FWIW, I've done the cone doping myself, and my first reaction to doping paper cones is suspicion. Why does it "need" this, and how/why will it really "help"? But I injected this example only to set it apart from the [Altec] horn doping, r...
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If you read Danleys paper, you see that the lower you go in frequency, the more this device turns into a direct radiator. He just vents the HF drivers from the throat, more or less optimised, the midrange drivers a bit further out and the LF drivers ...
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Hm, very different and very opposite result, interesting. Are you using the same S2 diaphragm as I do – the metal suspension? If yes then it would be the only one explanation that I might come up with.
Sometime the compression drivers with horn form...
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Hello Romy, hi all
I can make the horns with any requested throat size, 30cm or 10cm diameter, price is the same- USD 4000 the pair.The wood lathe will be ready probably end of this week.As soon as I have pictures, I´ll post them.Price is for a pair...
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Neil, I hadn't thought of it that way-- it would save money, only have to run one wire to each midbass too! You're too funny! The link Romy posted earlier: http://www.6moons.com/industryfeatures/vsac20082/vsac.html shows the throat.&...
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I have found 30ppi renticulated foam in an online aquarium shop and ordered it. It's specs is the same with what Geddes used as plugs in his horns. I will try that on my cf1400hz le cleach with varying depth through layering. First just a thin layer ...
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Maybe the upper midrange horn became like a paper cone speaker. Best sound I ever made, and it looks like this. It had the same ring to it as the magical SABA fullrange speakers - made of paper. But below 500Hz, I must use solid wood. The Fanes are t...
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Romy, whether intentionally or otherwise, "murky waters" is a beautiful metaphor for the Western Electric route, in my experience; that said, just because something does not exist, does not mean that I might not be made so with a less hidebound a...
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About horn body resonance: I used to doubt the need for mass in horns; after all, how much energy can a flimsy paper cone generate? Still, I went ahead and followed the advice of others when building mine, making them very strong and heavy. With ...
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In my illustrations as well as in the construction of my own mid-bass horns, I let the circular section of the 8" throat run all the way out to the mouth; it is tangent with the adjacent walls of the horn at any given point. If I understand correctly...
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Thanks, ferenc.
I went to Ocean Way Recording the Federated Mike mentioned but I did not see anything in there and I did not know that they have also an oceanwayaudio.com site. They call it the HR2 and it was built for them by Allen Sides, so ...
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Hi Romy, Splendid work - much appreciated research this!I know this is totally premature, but if you do find that you prefer the S2 as the flux is increased and hit a current limit for the coil, then you *might* get a flux benefit by using a lower ca...
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Well, I have a theory that the rough surface may be helping to attenuate multiple back-forth axial reflections, but from what you say, it may be that it results in - what's the proper term? - irregular as opposed to laminar flow at the surf...
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Ah Romy, did you not know that the old JBLs, RCAs (and possibly S2 as well) all have an internal flare rate of 160Hz? This is but one reason why I'm asking Martin Seddon to make me a pair of 160Hz horns......just had a look; it may have been 180:http...
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The Thiels I have heard "load up" considerably as the cabinet is pressurized. I suppose this is a strategy, but I will say again that I think the best results are when the driver is not pushed to Fs, and certainly the tuning should be...
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A big bonus is that pitch and harmonic structure have changed "correctly" to make them perfectly acceptable with my present speakers (a lazy boy's dream...), and the system, with LP source, is strong and rich enough to re-mine my record library. ...
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Bill Woods of the AH! Company:
http://www.acoustichorn.com
…. posted at his site a write up about the advantages of his conical horns:
http://www.acoustichorn.com/news/index.php?id=8313229270608416105
I meant to post a reply at his blog and...
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The previous response I posted, 'Partial Disclosure For The Sake Of Clarity', assumes you are referring to the second prototype of my proposed design. (The base design is the same, with the exception that it uses one driver instead of two.)[quo...
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I'm a new reader of your website and one subject which interests me a lot is that of upper bass horns.As you have noted time and again (with which I agree almost completely, after reading a lot of 'research' [many claiming to defy the laws of physics...
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I think the most interning would be to learn what kind MF and upperbass drivers were used, particularly the MF. I hope they are not the German BMS drivers as it would be a major turn off. It looks like 2” throat, would it be possible that French folk...
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[quote user="cv"] That said, I do have is a single 160Hz/1.5" finally up and running on a compression driver, and it's a different world - stunning. Actually the results are exactly as JJ described. [/quote] The JJ, is it Jeffrey Jackson? I have no i...
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Without wishing to open a can of worms....Mine are the 1443 - same as the 1428B save for the field coil voltage. I've finally got round to ins talling some of Cogent's replacement diaphragms to restore them properly. I can't say enough good thing...
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[quote user="cv"]AlloI had a theory that the bug screen was helping to damp horn modes/refelctions caused by a mismatch between the S2 internal flare and the horn flare rate. I have 340Hz flare JMLC horns, which may be expected to give less of a mism...
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I’ve been harassing my horn-maker for quite a while with an idea to go for straight, no-cheating 45-50Hx horn. We discussed it countless times and sometime probably we would go for this, and particularly if I figure out how to resolve the delays prob...
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