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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="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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I also am selling my JBL 2490 mid-range drivers and perhaps a collection of my original Aura 1808 drivers. The 2490 drivers are new and Auras are some old and some new. I just do not see myself to develop any inspiration to use them......
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The old Fane had no money to comeback, apparently someone took them over, I wonder who. The new Fane drivers? I know nothing about them. I did not know the old Fane drivers. I have only 24” woofers, 5M and 8M. The CRESCENDO series was available with ...
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Hi,Finally, I have time to build some horn speakers and learn what is it, bought JBL 2440 drivers and before my frame will by finish (next week) and horns will arrive I want to renovate those drivers. My question is:Can I take off that "grainy" topc...
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[quote user="Horn Savant"] I think it's about the same as free-air resonance - backwave to entire basement. Precedent: pre-war theatre horns(open rear like Shearer/ERPI)(unlike post-war reflex tuned designs like Altec A4)(I don't like reflex boxes - ...
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[quote user="msaudio"]If you look at the picture second from the the top, you will see 2 woofers mounted in front on the baffle, notice a 2 piece horn from the baffle. Klangfilm never had such a horn, they would start at the baffle and curve out. The...
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I wonder if anyone recognizes the drivers of the Cessaro Horn Acoustics? I thought that I know all of them but looking at Cessaro’s compression driver I have no idea what it is and I feel that my ego severally hurts. The pictures on the Cessaro site ...
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[quote user="el`Ol"]I think they could could make the sound more pleasant with an overkill of second harmonic distortion. But for people who prefer that kind of sound a relax-horn like Anima would be better anyway. No real solution. Maybe they should...
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I have recently been thinking about efficiency. Apart from enabling you to use low power amps, is there really any reason why high efficiency is better than low or medium efficiency, all else being equal (and I know perfectly well it never is, but le...
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[quote user="twogoodears"] Horns drivers from home listening are, must be differently built from industrial/P.A. drivers, period. [/quote] Yes and no. Yes, they might be, or even must be different, but can you elaborate on this idea in context of GOT...
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Romy, I do agree with all your comments. It is true that the magnitude of the rubber taste very much depends on the crossover frequency. I used them below 64Hz, but with first order filter, implemented before the amp that drives them. With that kind ...
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Since the “no tilting rule” is one of the Macondo’s Axioms: (#2 - “All channels shell have strictly parallel axis”) then I would like to defend it.
[quote user="be"] The time alignment will depend on the geometrics of horn set up and listening posit...
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Romy wrote :"...Years ago when I researched the subject of the drivers for my UpperBass horns and when I was trying many alternatives..."And in the Warfdale thread :
"... I had in past a few Goodman drivers but I was looking very different thin...
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I do not like the AMT Heil drivers at all. I have no idea what 5 times higher transient response they claimed but to my ears all AMT drivers I heard sounded like their upper notes are covered with 2 inch deep saliva. The Heil drivers are in my view t...
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The AudioFederation guy posted pictures from RMAF show with Cogent room. (The images are courtesy to http://www.audiofederation.com)
I was wrong in my previous post, as Cogent did demonstrate their loudspeakers with Ionovac ion tweeter. Yester...
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I see that Eugenie’s installation did not create in people to think about it, I think it is unfortunate.
Here are some important points of Eugenie’s installation:
1) Use instead of good drivers a large amount of mediocre drivers. By do...
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Hi audiofilofine.Nice drivers, although the picture is a bit fuzzy. Can you tell more about your drivers?Maurice....
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Paull, the horns might be “beautiful” but only themselves. When they are jointed with the rest Macondo spherical chennals then I do not like how it all looks together. Regarding the drivers, I do have a few options, I might slowly exercise them and ...
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Alex, contrary to the numerous speculation that many people more or less reasonably spread about the subject, my experience indicates that there are no such a things as “preferable crossover frequencies". The chosen optimum crossover frequencies are...
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Romy,I make 6 drivers = 95.8 db/W. You get 3db / doubling of the number of drivers ie 88 + 10log10(6 drivers).That's why I'm going with a bunch of Lambda TD15S (which are sort of a cross between the Altecs cone - paper, curved, foam surroun...
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Which RCA driver you use? RCA had a few drivers the pre and after war. I am familiar with a few after war drivers that I tried in my 330Hz horn and I was not impressed. Reportedly the pre-war MI-1428B shall be the one to play with; I did not have thi...
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[quote user="MINGSU"] Since they are very old pair of driver, I will recommend you to send them to GOTO Japan to make sure the driver are up to the spec. so you can be sure …. [/quote] Ok, but then they need to send them to me then in order I inform ...
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Decoud,Though I have a pair of 8Ms, I did some searching around for alternatives just to make sure I couldn't find something "better".Its not really a kosher approach, but my research was centered on vintage alnico drivers, origin...
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LOW FREQUENCY DIRECT RADIATOR DRIVERS
411A –18Hz, 93dB, sealed box414A - 99dB, 30Hz, Alnico, cloth416B – Alnico, 97dB, 25Hz, cloth416C – 16” version of above with Ferrite416Z - 12" version417C – 100dB, 69Hz, Alnico, 1.3T, 12”418B – 100dB, 55Hz, Alni...
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[quote user="CO"] May i ask if you have ever played with the Le Cleach flares and how you find them?They were created to reduce reflections directly back into the horn. Only problem is they are very large because of this.... [/quote]
Nope. I never h...
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I'm moving my two finished LF boxes (connected as 1 channel) around the room, trying to set them up to play more frequency-flat than I've been able to make them with only one box per channel.Putting one in the ceiling and the other on the floor, both...
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Listening the argument of the field-coil’s people I note that they constantly stress the demagnetization subject of the driver’s magnet, advocating that with electromagnet “the field coil will always produce the same strength now and 100 years in the...
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It is very easy to figure out acoustically. Feed the drivers and their crossover with a reference tone of fixed amplitude and fixed frequency, roughly in the middle of crossover point. Disconnect one of the drivers and measure the acoustic pressure e...
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[quote user="op.9"]Anyhow, what are the 2" comp drivers that ARE any good and are available comercially? I didnt go with any JBLs because I had a very bad time with the 2427 1" version, could never get any music out of it. [/quote]
I would be surpri...
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[quote user="MINGSU"] The waiting list is always 2- 3 month back log because there is no short cut to mass production of such precision audio transducer. [/quote]
Ming, I disagree with this sentiment. Any manufacturing is mass production; the ques...
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