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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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After years of using the Expressive Technologies SU-1 and SU-2 step up transformers I come across to a fact this morning that the Expressive was reviewed by Robert Harley in June, 1992. I read the Expressive’s preamp review but I never seen this one....
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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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Hi,Have peope heard any of the new generation hybrid amps out there? I have often such miserable power to my home that about half the time it was useless to listen to my SET tube system. I always had a back-up solid-state amp to use when I could...
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Thanks, Scooter.I am glad to hear from someone so quickly.I've been an "audiophile" for only 10 years or so. With the Edgarhorns, I am currently using a Cyrus Brenneman integrated amp (KT100). I also have a Yamamoto custom 2A3 (single plates) w...
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[quote user="N-set"]On the collapse, I did not experience anything that drastic so far...but I do get a lot of irritating chaos on complicated loud passages. At this moment I tend to blame the amplifier (a characteristic "breaking" of the solid state...
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Hi miab, my room is approx. 6x5x4m, so although quite small by North American standards (not UK!), the ceiling is higher than that of most modern houses. This seems to play a big part in the LF performance of any speakers in this room. I currently ha...
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Unlike transmission line reflections which are a REAL effects, torsion gravity has beena nice theoretical concept, existing on paper, but not a proven reality, mind you.This is a huge difference and I guess you are one of those rare people who shoul...
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Jarek,I am a professional musician, and am very much in "tune" with creative processes.A random result is not automatically "bad", but because of its "randomness", there is a lot of ground to cover BEFORE one can even think about further steps. Case ...
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Romy Hi, there is nothing to say really, I was trudging up the usual hifi route, ( B&W 800's usual high powered solid state amps ) I thought a turntable upgrade would be the last step! Went to GT Audio to listen to Thomas Woschnicks tur...
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[quote user="mjloudspeaker"] Romy the Cat wrote:A could years ago here and there begun to pop up small SS class “D” amplifiers made with high-end pretence. They all sounded like shit but by the efforts of a number of typically deaf and stupid or just...
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It is not exactly a non sequitor to say today's Koetsu is a myth. Say a restaurant's owner changed from Italian to Seafood. Maybe you expected fettucine carbonara, but instead you got fish and chips. However, maybe you are in the mo...
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Hey Cat,Well..my first question would be regarding the application. The big Melq tube is already doing the bass towers...is it not enough current? And wouldn't a proper class A 100w amp with its low low efficiency require something like 1...
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Another interesting thing: why not a lot of people make the single ended hybrids? I understand that single ended output has very low efficiency but still: it is only about the heat dissipation. I have seen some single ended SS amp. There was a strang...
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Hi Romy,
Could you explain a little more about the amp? If I understand you correctly it is a 1 tube stage with solid state (Mosfet or Bipolar??) output. If it is Mosfet then it is likely to be running without negative feedack, is that r...
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[quote user="morricab"]Could you explain a little more about the amp? If I understand you correctly it is a 1 tube stage with solid state (Mosfet or Bipolar??) output. If it is Mosfet then it is likely to be running without negative feeda...
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Dominik wrote :"...Its sounds very good, but how to calculate oval profile. Above project comes frome tractrix calculator with one Roomy posted. There was "auto cad option".I found "auto cad guy" give to him those numbers and he make all drawings in ...
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i definitely see what you're saying there.. but i do wonder if it has more to do with the economics and the powers that be than a full on case of negligence. most sound engineers-- or at least those i've known (and not the bastard species of fa...
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Hi Romy, I don't doubt for a moment that there are plenty of people 'who know' who will wax lyrical about the benefits of open loop eq in feedback circuits. There are people 'who know' who will tell me that valve amplifiers cannot be as good as trans...
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I have heard several Tannoy speakers in the past, but have never heard the quality of sound Romy has obtained with his brain child. I don't know whether it is the speakers alone or his setup which has allowed his system to enthrall so much more than ...
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1. The less we have to fill in for the brain to reconstruct the original event, the better it will sound. This has been proven by psychologists for all of our senses. The closer to reality the sensation is, the less the brain has to work, the more re...
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Ah, I think I got a good break. Just had a short listening session. And it did sounded very fine, with no compression and with all those gorgeous hallucinations in place... It almost like good versus bad electricity but I think I have a different pri...
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I had this "volume" issue with the dozen or so solid state amplifiers I tried in my bedroom system. There was a big jump in volume from click zero to click one. From click 10 to click max there was not much of an increment in volume. Overall, vol...
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Looks to me like the horizontal and vertical steps in the waveform are due to the diode switching. One diode turns off while the other turns on. Storage time on the diodes is normally short. But it depends on the test setup! T...
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Hi,I'm new to "Romy the Cat's Home Page," was impressed when I read a thread comparison of the Lamm L1/L2 linestage, which prompted me to post here. While I'm not an electronic's wizard (gift is mechanical), audio has been part of my life, dating bac...
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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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Romy, I have some (strong) opinions on DHTs concerning filament supplies versus specific tube types. For virtually ANY 45 triode, AC is my preferred option. Still, not all 45 triodes will be acceptable for my use, hence weeding thru many of them to ...
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Interesting Romy, particularly the "echo" affect and weird overtones with the aircap. I wonder if the thing is picking up resonances and if the impedance issue is responsible for the overtones... signal being modulated by the varying input capacitanc...
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truth to be told, i'm so far from building a horn for S3 that the plans may change. the drivers actually haven't left a previous owner yet which makes me a bit nervous. but i understand you presume a short opening horn like expo would allow a more me...
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This is our first offering; we are indeed working on another two higher priced models. One will have an additional channel on top, the other one will be front horn loaded down to 40 hz. Optional finish and colors, both for horns and supports, a...
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Hi Roman... you know "... but Twogoodears normally prefer a do not go to depth..." it's not an hide & seek kind-of-thing, but a necessity;-), as I'm not technical inclined or taught enough to discuss in depth of circuits designing... I'm only a u...
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