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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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These are clearly JBL pots and back covers (which have been milled flat). The refinishing job is quite nice, but the origins are clear. Also, the phenolic diaphragm is clearly for the 2482/2485 (and looks like a JBL part), which has a slightly wider ...
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[quote user="stuck.wilson"]In this thread, you previously said--
12) If a filter requires a phase inversion then it is preferable to flood crossover point with amplitude and do not invert phase.
What exactly do you mean by this and how's it work?[/...
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I may have a point on this
some years ago, I had some confidence with the owner of a shop, and he let me use the demo equipment, though in fact my budget didn´t allow to buy him more than a few cheap things.one day I was psycothic listenig to s...
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Rakesh,Thank you for your kind remarks. I appreciate the close scrutiny you have given my previous post but I think you are at a stage of system design where many basics of your system should be considered and evaluated before the issues of my po...
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Is it possible to change phase response in analog domain very easily?I think it's not easy and if it's possible it need complex circuit...
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ah come on guys. Measures have to be understood properly. U can’t judge every tiny pixel. And also you cant say a tilt here will sound bright or dull, coz your room can change this. Ok. Doesn’t mean everything is upside down either. Doesn’t mean, if ...
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I think that thinking about the audio problems in terms of phase is perhaps logical but counter productive for the reasons you enumerate Paul. It is not the humane thinking... but room *loading* and the DPoLS placement philosophy are... feeling the m...
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I spend quite a few hours playing with the new channel trying to ingrate into Macondo but so far not successful.
Since the new channel and the Macondo upperbass horn have identical sensitively and identical impedance I figured that I would drive it...
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Ok, none it is time to dive into the practical process of tweeters alignment. Once again I presume that we are taking about monopole tweeters that use AFTER your midranges compression drivers (read my previous post). Some people use term “supertweete...
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Dear Romy,OK, some more about the midbass.Well, it was not really a surprise to us that the horn without the phase plug was dissapointing. Without the plug we had a horn that was a bit too short, had too large front cavity and less compression than w...
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Robin, what you say about shifting your head while listening is very interesting in the context of this thread, since I happen to know that one of Haralnov's primary goals is the elimination of the tweeter (or any driver, for that matter) as a "sour...
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Hi Romy,
I haven't read this entire huge thread, so pardon my intrusion. I was wondering if you have tried to regenerate 120v by turning a motor by the shaft of another motor. We use that little trick in the commercial electric industry to generat...
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YL 75000 has heavy phase plug indeed , rca style (see sketch) while 1250 ( I never had one) gets a fixed metal dome equivalent to spherical piece on 75000 and rca plugs without conical shape pointing the exit of throat. Ironi...
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hi all,thanks for your interest !yes the frame is curved, HF and MF are //yes there is a phase plug in the bass horn. This cover 80-300Hz.there is a separate infra-bass section, covering 20-80Hz.images of the bass phase plug and the infra-bass sectio...
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It is interesting that S2 phase plug, if to look at it from throat, ends up with round-head bolt. The head of the bolt has a channel for a flat-head screwdriver. This channel should introduce an asymmetry into a perfectly symmetrical phase plug and i...
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[quote user="Iraschwips"]I don’t have any way of testing but the speaker is supposed to present a relatively flat 10ohm load. [/quote]This is an excellent tool for measuring the impedance load of your loudspeaker. I have one and use it all the time....
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*** … unless you are saying that the preamp Zout will possibly change the DSET filter phase somehow? Yep, this is exactly what I am saying. Look the impedance of your preamp is factored in the source impedance of your channel’s filter. The argument...
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I was asked a few days ago what I think about Zandèn new CD player and I replied that I do not think about it.
Truly, those companies produce new models each 18 month to initiate new rounds of cash extraction from clueless, deaf and blind audi...
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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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The Other End of the Single End: Modern Horns Done With Flare An Interview With Dr. Bruce Edgarby Dave Glackin, printed in POSITIVE FEEDBACK. 1996
Dave Glackin interviewed Dr. Bruce Edgar in his home, prior to the 1996 WCES. A follow-up on the speak...
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[quote user="Romy the Cat"]So, if the Ultimate MF Compression Driver is used from 1000-1500Hz then why shall it be able to play 500Hz? The answer is: he harmonic reserve – the driver that will be suited for 500Hz will have larger cone and softer sust...
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Sean, this subject is tricky. You might like your original Altec 802 better than your new 802G. (I did not
even know that they do new version). I have no doubts about your preferences
but how sure are you prefer the sound of the old driver juts bec...
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[quote user="RF at Ona"] Romy,I might have overlooked something on your site but I understand that your ULF amp is driven directly by the preamp line stage. If that is the case, you may want to consider an old technique for integrating subwoofers...
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[quote user="Romy the Cat"]Sean, this subject is tricky. You might like your original Altec 802 better than your new 802G. (I did not
even know that they do new version). I have no doubts about your preferences
but how sure are you prefer the sound...
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Steve Schell pointed to Bill Woods’ site aka RCAfan.
http://www.acoustichorn.com/
I do not know the guy but the site looks attractive. Some of his old large horns are interesting as so on… however, what make me to wonder is the horns that Bill Woo...
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electronluv do's not have the ability to make beryllium diaphragms or
the legal stuff to even buy raw beryllium i bet with a little surfing
you may find the companys diaphragms i use .
Yes 3.25" is to help get beter HF extension but to also get a ...
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[quote user="Gregm"]Coming back to the "multi-driver" spkrs -- especially unfamiliar ones. It has taken me a long time to "optimise" the positioning of a pair of 4-way spkrs (9 drive-units, of which two in the back, in phase)
….
One difficulty in ...
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Ok, the very first thing in your way to the proper Imbedded Macro-Positioning is to undusted what you what to accomplish. Most of you redder can not understand it before 2 reasons:
1) You were thought and learned wrong thing for too long2) ...
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Rakesh, during the last year, there were some very important moments in my own realizations about the methods of low frequency reproduction. I totally abandoned my Scanspeak bass modules and now they are resting in my garage. I intentionally have my ...
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[quote user="twogoodears"]Yes, maybe the 120 db/octave is THE trick for complex multi-ways systems of highest resolution, yet this barbaric:-) slope can ONLY be achieved by digital domain crossovering... unfortunately, as a satisfied user of TacT RCS...
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