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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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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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My first impressions a about the “differences” of field-coiled derived form the time when I ran the Telefunkens war time drivers but at that time I had no reference how the same driver would act with permanent magnet. Also, the Telefunkens are the re...
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I do not know how my S2 driver will sound but I defiantly know that it will have the problem with temperature. Looking prematurely at the driver’s sound it looks like it produce the necessary magnetic force at 2A-2.3A, that heats a lot of this driver...
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My first impressions a about the “differences” of field-coiled derived form the time when I ran the Telefunkens war time drivers but at that time I had no reference how the same driver would act with permanent magnet. Also, the Telefunkens are the re...
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I have re-read your post and your tone sugests that field coil drivers wi be used by manufacturers purely for their marketing appeal and not for any sonic improvement, Thomas Woschnick has just taken delivery of a pair of Cessaro Beta's which u...
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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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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 hole for magnetic 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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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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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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Are you decrying the use of field coils per se? A friend has been experimenting with them in a specific utilisation and has had very promising results....
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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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The subject of electromagnetic, or as they called field-coil drivers, popped up at my site numerous times. (Look as it list of related threats). The advances or shortcomings of electromagnetic drivers are arguable, I have my vision, but it is not the...
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[quote user="coops"]Ralph and Thomas are friends there would have been no price premium for the field coil option …[/quote]Considering that Cessaro claims that they pay for $500 worth TAD drivers (OEM) over $5000 then I might only imagine how much pr...
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[quote user="jweiss"] 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...
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Well, when we are talking about Cogent we need clearly differentiate two things: the Cogent’s drivers and the Cogent’s installation. The problem is that since Cogent’s drivers are something so called “compression drivers” then their performance might...
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[quote user="coops"]I have re-read your post and your tone sugests that field coil drivers wi be used by manufacturers purely for their marketing appeal and not for any sonic improvement, Thomas Woschnick has just taken delivery of a pair of Ce...
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[quote user="Romy the Cat"]
I do not know any advantages because the fact that the sound softer. I personally believe that the electromagnets have HIGHER MOMENTUM FLUX MODULATION and that make them to “sit” slightly… or exactly what I would like t...
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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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What I think I would need is microscopic pneumatic valve that I would be able to stick into my back chamber and that would have a little-bolt that would allow adjusting the diameter of the leaking “port”... Sure, it would be fun to have the valve to ...
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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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Hi Romy,I've seen and heard many products in which an aspect of the design is interesting, even thought provoking but where that idea's implementation is poorly achieved. It doesn't mean that one can't learn anything from the product even if it's onl...
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All below is written by Thomas Dunker
Yeah, "sound consistent independent of signal level" is a very precise way to sum up my whole speaker philosophy. Anything that is assumed to be constant, but which actually changes with signal dynamics is what ...
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Romy,
Air core is ok, but. 1. Self inductance in an unmitigated field clumps. You can easily see this by unwinding a hockey puck style air core inductor and measuring the inductance with each turn removed. Never will you have the smooth loss of indu...
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I have re-read your post and your tone sugests that field coil drivers wi be used by manufacturers purely for their marketing appeal and not for any sonic improvement, Thomas Woschnick has just taken delivery of a pair of Cessaro Beta's which u...
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"Eyes do the hearing" is a comment geared toward you as you make alot of assumptions based on just wait you see in photo .Your reality or mine?I was reading your comments on you s2 field coil and i think you have alot of good info about field c...
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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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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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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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