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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Well, I screw-in today the S2 with filed-coil into my horn. I decided to drive it with 2.4A. I used a regulated DC PS and did not employ my prepared for this tusk 4.2 Farad capacitor: the voltage is too high for my cap. The current gave me a ni...
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Alnico can take 400-500 degrees Celsius before getting demagnetized, neodynium only 70, so probably a S2 is a good choice.That ring cavety looks almost as if they forgot to put in a part.be...
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If you ask me the compression drivers is like the jbl 2420/2470 design only with an other back chamber. And the low freq driver really makes me think of an old alnico driver of jbl 2220A http://www.lansingheritage.org/images/jbl/specs/pro-comp/2420/p...
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Romy , I don't doubt any marketing opurtunity will be seized upon, have you experimented with field coils ? I have't heard the driver in the Beta, I am told that there isn't a great deal of difference sonically between the fiel...
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There is a German company called Expolinear ,wchich started to make ribbon tweeters based on bulgarian research .They make model RT7 pro with neodymium magnet and 100 dB /8 Ohm. I have a pair of their low efficient ribons (~88- 90 dB) with alnico 5 m...
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This is not a klangfilm MF Driver, it is a RCA MF Alnico driver with phenolic diaghragm and bakelite rear cover. I have seen a few of these and they sound pretty good for a driver that is good from 300hz to 8000Hz. Sounds alot like a altec 290 driver...
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[quote user="Merlin"] If they are modifying conventional drive units by hand, the labour costs alone can be prohibitively expensive. The fact that they are using heavy Alnico magnets and coating the diaphrams suggests that these units do not co...
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beryllium, SmCo, alnico, permendur, field coil, NatureFluxbassboost, equalizer, mp3-support, servo-subwoofer, compressor, room effectsThe difference between men and boys is the price of the toys?...
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No, I'm afraid not. I think the upperbass is perhaps some new production (Mike Harvey) 15" Vitavox Alnico item and I think there is a TAD unit behind the brass trumpet but I don't know which one. You'd need to ask. I think there are various options...
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I liked your previous post . A week ago I repaired old Telefunken tube radio (Single EL84 with array of alnico speakers ) with FM band and I'm listening to classical public radio for whole week. Not even once I had desire to turn on "big" system I'm ...
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[quote user="Romy the Cat"]I thought that the folks who are interesting where I am going with my Macondo should know that am still working with Vitavox S2[/quote]OK, I think now I’ve learned whatever I need to learn about this driver. In order to und...
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Very interesting… Earl Geddes just posted his thoughts for the Morons at the AA. I do not know is he was inspired by my post of by the completely foolish nose that the AA’s idiots razed around the Cogent’s Steve and Rich experiments but still – it wa...
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[quote user="Wojtek"]This is probably the reason I can listen to EV Patrician IV in relatively small space and close to the speaker without much of fatigue. The other factor must be that it's 4- way design with narrow band-pass for each horn. E...
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I was thinking about the subject for a long time. People in audio love to make generalization, so do I, but in it is not so simple. People attribute to output tubes some “special” qualities but I more interested not about unnecessary drooling about A...
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[quote user="chaos"] i searched your site and the web, but could not find a pic with the same diaphragma.it seems to be completely alu, but with a clear plastic-ring glued over the border of the hemisphere and the flat part with the grooves.its not t...
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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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Well, the first hurdle is matching efficiency from a dynamic driver to over-the-top horns like yours; but perhaps for others with somewhat lower efficiency horns...http://www.supravox.fr/anglais/haut_parleurs/285_GMF.htmI have had my eye on this one ...
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A Netherlands company that makes loudspeaker of the color of lesbian solidarity announced their flagman model: Euphrosyne.
http://www.pinkfaun.com/
It is 101dB d'Appolito configured ported Altec 414 supplemented with a 20” horn armed with Altec com...
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Romy, may be the alnico jbl 2482 + aluminium diaphragm (plastic surround) would suit for your application here. I tested such driver on 200 hz tractrix horn and worked fine. Went down well under 200 hz and is 2" throat. It is heavy but I would be usi...
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Good start Dan!The JBL phenolic 2" driver is 2482.I would lower the crossover point as far as you dare, 300Hz or so.Now the 2226 will do what they are pretty good at.Later you will likely want to filter the 2445 around 2k.A 600Hz horn with a 1" drive...
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In the case of the Audio Note field coil cartridge the field strength (and hence output) was significantly less than that from the permanent (AlNiCo) magnet equipped Io. Yet the performance of the field coil version (Io Ltd) was 100x better despite a...
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The point of the field coil is to saturate the piss out of the magnetic circuit so that the coil flux does not modulate the motor. Romy, I suspect that your experience of them may be based on an older drivers where saturation was not the name of the ...
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So, two almost two years later and this contraption is still in my room and "ain´t goin nowhere" :-)Guys, I became obsessed with horn speakers and specially with Onkyo product so I would like to share with you my latest experiences.The speakers I tal...
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say how much the old man is involved in all this cult and noise around him? I've also read all the poetic stuff on the site and can't say that this mystical aproach is not appealing. I had the impression that Sakuma just entertains himself makin...
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Hy Paul, I agree with your comment about the tone of the passive radiator if it runs to the mid range. This is the point of the SS8565. the combo of the crazy stiff cone and the special surround works phenomenally well to stay linear. It is even bett...
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A few years ago playing with my favorite Vitavox S2 driver I was asking myself how it might sound if instead of the Alnico magnet the electromagnets would be used. As many other driver of the period the Vitavox did not utilized the only one magnet ty...
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yes romy but my english is badThe JBL 2420 alnico sweet sound with my trumpet tactrix not felt the need for a tweeter, but the high was a bit behind. with the field coil at 100 volts sounds almost equal all'alnico but increasing to 130 volts, so that...
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first post, hi everybody!plan to build a midbass horn around the gpa 515-8ghp, throat 9,9", mouth 24" x 39,37".945something sq inches.(excuse the strange numbers, metric units in europe)crossed at 500, s2 alu diaphr.(is it normal for the metals to ha...
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Well, let start with factual data:
http://www.mceproducts.com/knowledge-base/article/article-dtl.asp?id=32
How relevant it is for us, the audio people? Probably very little, and the most important it does not answer why TAD use cobalt in their twee...
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Boston had a cold winter this year. Well, you have a cold winter every year!I could see that an alnico magnet in an attic, which I assume is not heated, could be affected by the cold.Have you ever monitored the temperature in the attic?For that matt...
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