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Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Romy wrote:For Vitavox S2 to use Tractrix 600Hz with 1.5KHz filter is a bit too close in my view unless you stay with second order filter. Would you elaborate further about your warning? I'm very interested in this application.I think you use the S2...
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[quote user="Romy the Cat"]I am not sure what you are asking. If you willing to get 400Hz horn into 1” tractrix then it might not be any controversy about the horn’s length, it is already given and the folks from lab.de will know it and will do the r...
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Stitch, you expressed a very valid point of view. We are at severe devaluation of reference points and nowadays any Moron with a rudimental knowledge of HTML and a few vocal cronies can become a “reputed manufacturer”. A few months ago a guy I know b...
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[quote user="kodomo"]Hey Anthony,Your project is going on track (and looks like a very good track)! Just a reminder about the room acoustics. You are talking about bass frequencies which are as dependent to the room as the speaker! Before installing...
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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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[quote user="Stitch"]The normal audiophile has a problem when he marries first and wants to add a good Stereo System later.
One of my friends did it right, he bought his system first and married later, before he did that he showed all to...
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This is my first horn build effort. Been thinking about this since starting to build loudspeakers and finally have a listening space big enough to support a horn system. This is where I am at now, I know there are opportunities for improvement. And I...
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I'm not sure exactly what I expected from swapping the digital cable at this point, but what I got was not it.Before I bought the Belkin Synopsis cable I just swapped out, I had sought out and purchased an Acoustic Revive cable, on the strength o...
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I had today the “fundamental channel” plug in and was trying to listen it. As usually I do, I connected juts one single crossovered “fundamental channel” to a single amp and try to live with it for a while. It usually takes for me a week or so to fig...
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I did not do anything for a while on this amp but it looks as now I have almost completed the first amp in it’s final, not prototype version. There are just a few minor things left but the core is already there. All 6 channels are fully flitted, test...
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The throat diameter of 7" is what I first approximated as an acceptable size, with the 4" being an alternative (should some unwanted effects arise, I may then experiment with the 4" throat). I can't simply assume 7" will be correct (though that...
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By the time I got seriously involved in hi-fi, in the early 60s, speakers and their drivers were already undergoing significant changes from which they would never "recover". Basically, for reasons that are no longer clear to me now, drivers and...
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[quote user="be"] Instead of defining the ULF range from the reproduced instruments, it is much smarter to do it based on the first resonance frequency of the listening room, because the frequency response of a closed room has a 12dB/oct rise in ...
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This year is the first winter that I live with this new listening room. Last winter the playback was up and I still was playing with minor arrangements of my ULF channels, cable and a few other things. For many months I do pretty much nothing with my...
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It’s been such fun, and so gratifying, to keep getting
“more” from The Loudspeakers, which have so far been a veritable Sonic
Cornucopia, exceeding my expectations and delighting me again and again since I
first listened to Music with them, as...
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Jim, I have sent you the tubes – it might be an interesting journey.
I send you:
1) 6C33C that was working with both cathodes approximately a year. It is not dead year but it is deep into retirement age. Run it at 220V and 200-250mA full-tube,...
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Here is a VERY interesting paper http://www.anstendig.org/Stereo.htmlSTEREO: A MISUNDERSTANDINGTHE THEORY, SOUND-SYSTEMS, AND PROBLEMS OF HEARINGThere is a common misconception that the addition of stereophonic sound-reproduction was the necessary, c...
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Hi there el Olyou are on the right track. (I know your post is quite old now, but I just found it today when I googled my own site).I am the one who invented the Polyepicell cones of Kea Audio.I bought the patent papers that Mr Podzus made over 60 ye...
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[quote user="drdna"]Remember I am not systematically anti-battery. I am anti-"pro-battery" which is to say I do not view it or anything else as a panacea. Each electrical device accomplishes a goal and degrades sound. The goal is to work within your ...
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Crossovers are so annoying, about impossible to nail down, and it's almost as though the more you study the problem, the fuzzier the "answer" gets.For now, I would like to more or less forget about "phase" considerations, partly in order to get this ...
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[quote user="Romy the Cat"]
The only concerns in my room are ceiling and a small fraction of
back wall. The back wall is very small – I am sure I will take care of
it. The ceiling is a bitch however. My leading idea is to use the sails
in th...
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[quote user="mats"] The Brahms is indeed a lovely 24/88 remaster. I also ordered and received the Wand Bruckner 1-9 box from the new Sony series, and there is no mastering information on the package as far as I can tell. Does anyone know if the...
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I am with you with you anti-servo prejudgeses. The moment from motor, regardless if it is strong or now weak, should be constant. At the very moment when the moment changes it’s value the platter performs a microscopic “move” in it’s bearing. So the ...
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Haralanov, I do not think that the “information” that you found is indicative of anything. If they changed coils and diaphragms on their LOMO drivers (and I presume that if they change the diaphragms then they did not keep the LOMO original suspensio...
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[quote user="Romy the Cat"]I have no idea why you are surprised that I submitted my test. Anyhow, I do not know what to look at and how to interpret what I see when I analyze the result of this test. The feedback that Paul R forwarded to me did inter...
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Well, my experience indicates that if in the installation of this topology people chose to use 4th order crossovers then they play crappy pop music on their audio. To play pop music within playback and to have pop interests in music is certainly not ...
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[quote user="Romy the Cat"]Folding introduce a bunch
of resonating chambers and cost audio coloration in most of the cases that do MASK
OUT the transient dynamics but folding itself should not have an impact to dynamics
itself.[/quote]Might be the...
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Hi alex. Sure the 12 incher starts narrowing around 700. But the horn does too. And in that area you cross both at -6dB. which contributes to narrowing vertically. The magic is, to merge in a way that off axis its not getting too odd in a complex sum...
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[quote user="oxric"] If the issue is merely to recreate a better sense of the live performance….[/quote]It might be not “recreate a better sense of the live performance” but rather to be able to administer in my own and deliberate way some “listening...
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[quote user="TonyB"]Romy, what are horn flare frequencies of your horns? I understand that both are Tractrix. My guess is that the midbass is 125Hz with a sealed rear chamber and 4" throat. Correct? [/quote]They tunes for 115Hz and pushed in room dow...
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