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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="Paul S"]Meanwhile, I was thinking
about field coil drivers, not to introduce a new topic but to re-consider the
driver itself as "tune-able", at least with respect to the gap. [/quote]
Not willing to much to hijack the thread but I ne...
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Be, I have made a lot of experiments and I confirm that if a permanent magnet (Ticonal, Alnico5, Alnico3SC) is heated up, the sound gets a little softer, but the typical "screamyness" is still there as if the sound comes from a very little zone, stuf...
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MochaMike, yes you are correct it would not be the “softness” but rather”liquidity”. Still what you are taking is applicable for the paper cone 4 to 15" drivers not compression drivers. Who knows how the compression drivers will react.
To the rest ...
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I'ts not that I feel "someone else's would be more informative than Cogent". Rather, even though I know what I heard from the Cogent version, I cannot at this point say I understand how much and what part of what I heard is ...
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Hi RomyWe build horns anyway some one would like , i have been making the horns that are in the pic for me + the drivers that it use the drivers are a mid bass driver are a6" alum field coil driver i like the sound of field coil magnets +...
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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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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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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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[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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[quote user="noviygera"]I am very curious what "properly made" means when perusing the tonal attributes of LF. What properties or specifications other than driver diameter do you evaluate when perusing a better tone?[/quote]
Normal
0
21
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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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[quote user="vinylithicum"]Here are some of my observations regarding the Wolf von Langa RCA 1428 replica. I long time wondered where mr. von Langa gets his phase correction elements and the diaphragm for his RCA 1428 replica. It's obvious that a nic...
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and especially "perfectionists" markets like Germany. Sound is of a secondary importance. I bet the new driver from Cesarro will be field coil driver because that's what peoplewant NOW. They want "the best" and field coil is now the best. Roman , som...
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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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[quote user="decoud"] If a magnetic field is static, who cares how it is created? Isn't the main potential advantage of electromagnets one that no one has explored at all - the possibility of modulating the field strength in direct response to the au...
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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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[quote user="cdwitmer"] If Very Knowledgeable Guy ever had an opportunity to do a listening comparison between a Feastrex Type II field coil driver, which has a Fe main yoke with a Fe49–Co49–V2 pole piece and a Fe49–Co49–V2 top plate, and a Feastrex ...
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[quote user="twogoodears"] Christine and Wolf Von Langa deal in nice mods, restorations and rebuilding from scratch of classic Altec's drivers, adding the sought-after "field-coils" feature instead using permanent magnets... a snobbish, yet highly co...
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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="be"]I just spoke with a guy who have made both permanent magnets and electro magnets for loudspeakers.He said that the reason that electro magnetic speakers have a smoother and more grain free sound, is due to the temperature rise in the...
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[quote user="Romy the Cat"]I think to conduct any more or less methodologically cleaner experiment the best would be to have the field coil with multiple taps. Make the coil standard 600V rated and to design the coil to have let say 4 taps that ident...
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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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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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[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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The reason that I built the 6C33C preamp was to explore the 6C33C true musical potential like I did with the 845. Not only did I compare the sound of these tubes in power amp, but also in preamp. The reason is that with power amp you might hit some l...
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David,
You can trace him from his commercial site
http://www.field-coil.com
I do know if it his site but he most likely hangs around there. I think that field-coil.com is rather a group of people with certain interest and certa...
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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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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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At last weekend's HiFi Wigwam Scalford show several members brought together various elements to make this 5 way speaker system.[IMG]http://i254.photobucket.com/albums/hh107/pure_sound/communalsystem.jpg[/IMG]Picture courtesy of Alfie29021. Raal Amor...
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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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