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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="hagtech"]Interesting. I'm wondering here if this is the key to eliminating the honkiness I hear in most horn installations. From your experiments, it seems that the low frequency extension is key. Push it too far and it...
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[quote user="cv"] But the real reason for my post is to ask:I was thinking about the results you reported and am really scratching my head as to why the FC S2 should sound honky, given that its acoustic geometry is completely unchanged. Any idea...
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This week I will be trying to address why the Milq midbass is clipping. This is very interesting one. Currently the Melquiades LF channel uses an output transformer 700R to 5R or 11.83 to 1. I thought before that I have much lower ratio, like 5:1 bu...
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[quote user="KLegind"]Initially I thought the Zu might be an interesting speaker in the context of tube amplification, however I tried the fullrange driver approach and I have misgivings about it...
Anyhow, the industry rag Hifi World (with wh...
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Understanding Line Array SystemsBy John Murray
Behind the buzz, there are a lot of factors at work in line arrays. An explanation and comparison of current models. This discussion can’t be contained in just a few paragraphs, so we must start with th...
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It is nothing to do with Wisdom. It is my principle of application of “cost” as a common sense design tool. I do not bitch that Duelund caps are expensive. I just try to find a rational solution for using them that would embrace their price. My ...
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Romy,
I have somewhat different possibilities than you are seeing. My system is physically higher than most because my listening position is at standing height or sitting in a high stool. I have used this litening height for a few years and gr...
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A German company Avatar Acoustics makes loudspeakers with adjustable positioning of their ribbon-tweeter. This is very much with the context of this thread although I’m questioning a lot of things in those loudspeakers (pretty much everything beside ...
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Yes, and lucid explanation why parallel caps on AC between neutral and hot affect sound does not exist. To make the things worst I can tell you that you can put 4324 regenerator or transformer of any kind after this cap you still will have no bass. I...
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I got an email from a site visitor informing me that there us a set of cheap ALE drivers at London Craigslist: http://london.craigslist.co.uk/eld/4435844980.html(copy locally to have it available after the Craigslist posting will be gone) "ALE Acoust...
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de Charlus, I still do not think that there is such a thing as “ the only a theoretical starting point”. Perhaps you were inspired by Jeffrey’s recommendation that has more experience in it then you. Still, the compression drivers loaded into giv...
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Romy wrote :
"...What I expected the S3 does very well – it runs at 600Hz with first order with no “issue” in the bottom region (250Hz Tratrix horn). The next step will be lowering the crossover point to 500-550Hz (that are ultimate objectives)... ...
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The system is still very much a work in progress, but I have come to the conclusion that the concept as such is very, very good. It's only up to me to make it sound as well as I know it is capable of. Making and fine-tuning the crossover might take m...
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Thanks for your comments, Romy.Edgarhorns weren't an obvious choice. Many horns never worked for me. The Avantgardes left me cold. So did the single-driver crowd (I just don't get it....), Altec VOTs, PA systems, etc. But there were some systems ...
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Sure, I’m very much done with Macondo and the late frame is the last straw that I load to this camel. It took 60-7 years come up with where Macondo is now and I do like how it turned out to be. In a week or so I will be done and I will post the pictu...
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Yes, I was not able to decipher right the way why they did it. My initial feeling was that they made PROPER horn and use a PROPER driver and then, because the approximation of cut off to horn rate they had audacity to cut off the response on the horn...
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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="ulf"]A few years ago we discovered the tractrix horn for MF use. It was really the most important improvement so far. No more honking exponential horn sound. The improvement was so clear that A/B testing was not needed. [/quote]
For wha...
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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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It certainly has nothing to do with my ear or with being
acceptable. We attribute too much attention frequently to a topology/hardware and
too little to specific efforts over given implementations. So, what is the
subject? The Multicellular horns?...
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[quote user="jessie.dazzle"] Resonant frequency :
I did not try to measure it. Can anyone confirm the following : I assume this parameter is most easily determined by playing a series of tones at constant signal strength (volume setting) whi...
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[quote user="anthony"]Romy, I
appreciate that this is an old thread now and that you may not remember
everything from your time developing these amplifiers, but I have a (hopefully)
simple question about the upperbass crossover in the schematic ab...
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Somebody at AA asked about the difference between electromagnets and perm magnet. Thankfully the AA idiots who pick the pieces of brain at my site and already learned that the idiotic blabbering about “the electromagnets have more flux” is comple...
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It's still first order since you have more than two octaves overlap.
But it's a two pole quasi first order as well. I use this trick
sometimes. The problem with first order is that excursion continues to
rise below the crossover point, which of co...
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Well, first of all the phrase “rated flat to 300HZ” is kind of ambiguous. There is no such a thing as “rating” - they write whatever they wanted. Second: yes, you understand me correctly, I would prefer to have lot of room at bottom and I feel that i...
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[quote user="Romy the Cat"]The line-level crossovers work against fixed impedance and therefore the crossover point and the time alignment does not fluctuate along with reactance of the drivers.[/quote]Okay, maybe this is a dumb question, but why wou...
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Well, the LL1627A is very good universal transformer with phenomenal flexibility (properly done - with section not with tabs) to load the output stage. It might be a good choice for a full-range amp at 200mA, though I would still prefer to have a tra...
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It might not be directly related to the subject of this thread but I would like to pass this comment. Over the years of observing the better and worst in upper bass I come to an observation that the front loaded horns with dampened cones might not be...
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Okay... I also downloaded the original Milq SET amplifier PDF and have looked at it in detail as well as the 6-channel adaptation (DSET) and I understand where you're going with it... or so I think. In my particular situation, I've owned two pair of ...
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Ok, here is what I end up with. This version is something that I am planning to give some listening, the fist listening as I this filtered down the intellectuals reasons do not listen it. The amp is fully operational, bit made as a test amp inside th...
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