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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Well, without any theory or gut feeling to guide us, we are flailing around. So let me tell you what my instincts tell me and you can take it or leave it.I think the main advantage of the EM is reducing flux modulation. There was a post recently by o...
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[quote user="coops"]Romy I have read on this forum that you are not particularly keen on the very low output AN Japan ( and Uk ) cartridges, may I ask the nature of your experience with them , have you tried the field coil versions? [/quote] Keith, I...
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[quote user="cdwitmer"]I'm probably revealing my ignorance by even asking this, but I'm curious to know if a field coil ribbon tweeter could be practical. It occurs to me that if one could be made, it would be a lot safer since it wouldn't be a black...
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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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Continuing to harass the readers of my site and myself with the good news about the performance of my SA8535 driver I would like to post a very educational article about the subject. As I told before, being familiar with sound of ribbons then never i...
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Ah i just read your article, and its funny that i share the same believ. While you were experimenting with the telefunken field coils did you also notice that the amount of current running tru the field coil also has a great of impact on sound and re...
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[quote user="cv"]I presume this is with the new production diaphragms? Just wondering if the old ones might restore some of the youthfullness which was diminshed by the field coil?[/quote]Yes, if was the new production diaphragms with plastic suspens...
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I have looked at the Feastrex website. The picture you show is of one of their permanent magnet drivers. This uses their Naturflux magnetic circuit. Mr Akiyama's quote also refers to one of these permanent magnet drivers so you shouldn't be atta...
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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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[quote user="cv"] I think the main advantage of the EM is reducing flux modulation. There was a post recently by one of the attendees who went with Feastrex claiming that Dr Kilppel (of famous measurement tools suite) measured one of their drivers an...
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I predict a highly probability that a new wave is coming in high-end audio loudspeakers. The today’s high-end audio the loudspeakers field is in a complex stagnation, the stagnation that will lead to the need to invent a new ways to sell loudspeakers...
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I don't know the full story of how loudspeakers went from field coils to permanent magnets. I believe that ultimately it was dictated by the price and availability of Alnico. Eventually Alnico became cheap enough to make similar or higher strength ma...
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I hooked up that old organ yesterday and listened to some stuff i remember listening to through it before. Before i get any further it's the only thing with tube amplification in the house, pp6v6 ~6w, driver is 12" Rola. My observation was that it wa...
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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="guy sergeant"]I don't know to what extent they've tried to apply the Naturflux thinking to the Field Coil circuit. It would not surprise me if that was much more difficult to do. It may have made the costs far too high. I don't know. [/q...
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[quote user="coops"]I have't heard the driver in the Beta, I am told that there isn't a great deal of difference sonically between the field coil and the alnico magnet versions of the driver. [/quote]
It is most like that people who told...
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Yes, steel chassis can be both good and bad. It likes to conduct magnetic fields, so you have to treat things appropriately. A little spacing under a choke can go a long way. Otherise you have a 120Hz motor. I have another tri...
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What the sonic impact will be? I clearly have no idea. I was slightly desponded and warned that my excremental S2 with electromagnet did not have the “sonic impact” that I find useful.Regardong the Quartopuss... Chris, you're confused because t...
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Romy I have read on this forum that you are not particularly keen on the very low output AN Japan ( and Uk ) cartridges, may I ask the nature of your experience with them , have you tried the field coil versions? Thanks Keith....
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[quote user="electronluv"]"Eyes do the hearing" is a comment geared toward you as you make alot of assumptions based on just what you see in photo.[/quote]
It is not just about what I see on photo but about which design principles a given depicting ...
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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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[quote user="slowmotion"]I hope anyone interested in JMLC horns read the last four links, where Jean-Michell writes about his reasoning for his horn profile.[/quote]
Yes, Jan, tanks it was interesting. Unfortunately the words means little in ...
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Romy's prediction of field-coil speakers as the next move for the industry may already have started in small segment in Japanese market. There's Feastrex and Shindo, then G.I.P Laboratry who specializes in W.E. clones and seems to be gaining a ...
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Very interesting application Romy, I really like the adjustment system that you built in. I have some EV tweeters in the shop, never even listened to them. Steve Schell and I haven't gotten to the point of trying tweeters in our field coil system yet...
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Field coil drivers, the next wave : Yes, brilliant indeed! The time is very right for such an "evolution".
And, we can hypothesize that it might have been so... Had Romy not posted this prediction.
However, in so doing, Romy may have just short ci...
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Ralph and Thomas are friends there would have been no price premium for the field coil option, they would have listened to both versions of the driver and made a decision on sound alone, I take your point though of an old technology resur...
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given that you are only really interested in measuring the field strength in one particular size of magnet gap ie that of the S2, is it worth considering making your own as in this link. http://home5.inet.tele.dk/f-hammer/fildcoil/measure.htmOne coil...
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Hi Romy,
When we spoke at CES, you mentioned that your experience with field coil drivers only extended to cone types. So I assume that you have never heard any field coil compression drivers. That would include the WE 555, 594, RCA 1428, Lansing, e...
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Romy, I presume this is with the new production diaphragms? Just wondering if the old ones might restore some of the youthfullness which was diminshed by the field coil?...
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[quote user="guy sergeant"] I have looked at the Feastrex website. The picture you show is of one of their permanent magnet drivers. This uses their Naturflux magnetic circuit. Mr Akiyama's quote also refers to one of these permanent magnet drivers s...
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