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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="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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[quote user="Dominic"] i thought of it as soft and chalked it up to not being as strong a motor as was needed and begrudgingly accepted that perhaps 'field coil' did not mean 'powerful motor'. I'm starting to think otherwise…[/quote]
Yes, it is exac...
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Hello again Romy and cats... sorry so slow in replying to this thread... the recent posts generated an automatic email reminder... :^)so a few things... one, there is a pair of Goto 370 on eBay and pictures of insides... the newer ones are made the s...
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Trying to explore the upper bass channel reaching up to a Victor Sierra 360 Hz horn with an Altec 804 with a 4 uF oilcap, I first used my OB Supravox 215, then a B&C 8" woofer in a large BR originally used with EV 15" (the latter not good) ...
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[quote user="cv"] I couldn't unscrew the top threaded piece myself. Perhaps I was turning it the wrong way?! Any guidance you could give on dismantling the driver would be appreciated.[/quote]Chris,
To take the outer ring is very simple. Uncre...
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I really don't get out much any more, just happened to run across this while looking for high-powered SETs:http://www.avguide.com/news/2008/01/23/ces-2008-dick-olsher-investigates-tube-gear-at-ces/4/Look at text down below the Classic Audio speaker p...
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The voices, the voices...Just a word of warning, if you do decide to give this a go, remove the diaphragm first and be sure to have exactly the right size screwdriver - that bolt is prone to flaking...Might I suggest that if Macondo has evolved to th...
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Allo R,Not to start a pissing contest, but how are they wired (series/parallel?), and with what voltage across them? Something just can't be right; the makers spec is 88db / 2.83V, which is over 1W. Unless it's uniquely smooth room gain with the arra...
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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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We had this exchange with Christopher Witmer, who lives in Japan, via the AA about the new driver form some small Japanese manufacturer. The dirt who runs that form has deleted the whole development. Hm, people wonder why for years I have a vocal and...
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Zdravstvui Roman, hi Chris,
I know almost nothing about the relation between sonical effect and
physics, so I will only try to speak about the latter. Take it as you
wish, I can as well delete the post if it just increases the
entropy.
...
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[quote user="TonyB"] So do your horns have 115Hz flare frequency? (and have the rear chamber tuned for 115Hz as well) [/quote]
They are 35”. Do your math. The back chamber tuned at 115Hz.
[quote user="TonyB"] From the pictures the horns look like t...
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Hi Romy, I've been following your progress, it seems that you are drawing some very similar conclusions to what Steve Schell and I have learned. The bass horn has to be the proper size in order to work well, we are having ext...
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Not to be too presumptuous but i thought i'd start a thread that could serve as a repository for lowther comments, ideas etc.the impetus for this was that rola experiment i mentioned in the cogent rmaf thread. I was thinking hmm, 'hard', 'shouty' tha...
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AlloI didn't say this explicitly but the audibility of the power supply might support the theories about the flux modulation being bucked by the combo of coil and PS.I mostly wanted to mention the layering idea and - ah yes, that was it: see if you c...
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[quote user="guy sergeant"]Some of it, (the current speakers and some of the amplifiers) are in my view, not outstanding. Other items, (the big preamp, phono stage, cartridge, MC transformer, silver cables and largest power amps are exceptionally goo...
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Hi Romy,You wrote:"They tunes for 115Hz and pushed in room down to ~95Hz one channel and 150Hz another."So do your horns have 115Hz flare frequency? (and have the rear chamber tuned for 115Hz as well)From the pictures the horns lo...
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The big RCA field coil is the best thing about the Cogent system. It has great "promise", based on what I heard. Although their methods of "developing" this driver seemed confused to me, they do have truly encyclopedic knowledge...
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[quote user="coops"]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.[/quote] Where did you see in my post above express any condemnation or support...
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Romy said:"I am talking about that “slippery sound” when sonic granularity goes all that way down (positive thing) but along with loosing granularity the transport for the ‘events delivering” is also diminishes (negative thing)."Romy, I have for some...
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I don't know why the Berning topic gets everyone so worked up. No need for another ZOTL screaming contest. Is this not a hobby where we explore many solutions? It is a difficult subject technically. I for sure can not speak about th...
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[quote user="Paul S"]Romy, I have for some time called this phenomenon the "necessary roughness", and one of the things I liked (loved, actually) about Cogent's main field coil was that it did this very well indeed over about 2 octaves; in fact, it w...
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| agree with your feline wariness with regard to torch bearing disciples of any given faith, be they believers in Altec, Audio Note or even Vitavox. In the case of Audio Note the fervour has often been exacerbated by the activities, pricing and ...
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CV,Nicely put.... and thanks for the Rp information on the 6C33. Do you have any thoughts, or a curve trace source, about the Rl ratio?
Now, since air core's are to be your weapon, here are some thoughts to explore.
1. Wind biffilar or ...
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The idea of making a copy of an s2 driver also intrest me, but i have some other ideas than just copying this driver.I have been thinking to make this driver with an field coil magnet a 12 volts (using a car or camping battery) and a 250 volts versio...
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Thanks for the picture Romy. I couldn't unscrew the top threaded piece myself. Perhaps I was turning it the wrong way?! Any guidance you could give on dismantling the driver would be appreciated.
Regarding the active flux modulation idea; I think yo...
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Romy, Our bass driver has a 12v field coil motor, it developes just over 20 kilogauss flux density using a low carbon steel pole piece. The exit diameter is 4 inches at the moment. The diaphragm is 6 inches in diameter and mad...
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I find this project so fascinating. I find it particularly interesting because one of my first experiences of good sound involved a field coil driver. Many years ago my grandfather bought an old hammond chord organ(predates the b3 and other...
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[quote user="Jeffrey Jackson"] first, basshorns... the basshorns that I posted here some years back are my straight ~50Hz horns (my memory is fading)... they are 8' long... then rear chamber.. mouth ~ 3' x 4'... throat ~8" x 8"... rear chambers of va...
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[quote user="Jeffrey Jackson"] so a few things... one, there is a pair of Goto 370 on eBay and pictures of insides... the newer ones are made the same, but it seems that the execution has gotten a better/cleaner compared to these.. my diaphragms look...
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