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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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The baby grand piano that Amy brought with herself in my life is kind of making me want to experiment with it. The piano is from Amy grandmother’s youth and it is probably from 30s. It is not bad piano, I have seen much worse, but it is not Steinway ...
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Well, I remember being "astounded" years ago by Crown's "DC" amps' LF capabilities with an ever-widening range of LF "tasks". More recently, I was "impressed" by plate-amp-driven subs at THE show. I haven't gotten to ULF with my system yet, but I p...
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[quote user="mats"]I really think the upper bass implementation must be flexible, depending on recording and composer. Plus 3-5 dB for Mahler, more for Bruckner? Actually it is probably not loudness so much as volume of foundation.[/quote]It was wh...
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Yes, for practical reasons, one side of an IB driver is usually "wrapped and sealed" to deliver lower frequencies from the other side, since it is generally impractical to actually make a baffle large enough to prevent sonic shorts. However, at high...
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I was wondering what would I say or do with my house-build in horns if I move from this home? No, no not, the horror of married life that audio people love to tell to each other are very much not applied to me. There is no problem with computability ...
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Charlus, it is not about an expression of gratitude, trust me, I am very indifferent neither to criticism or appreciation. Ironically what you are trying to do is in a way an organic holding a touch of a few audio ideas that I happened to advocate as...
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Hi Amir,we must be careful when talking about limits. We need much more than we think. This is because instruments interact. One instrument playing 440Hz (A) and another playing 465Hz (Bb) create a difference tone of 25Hz. Depending on the intensity ...
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We refer to playback singularly as an audio event as we have recorded sound waves with acoustic devices (microphones) and play them back through other acoustic devices (speakers/headphones). The basic rules of stereo are generally adhered to (phase a...
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[quote user="scooter"] One thing is sure: either the user's measurements or the SMS has a serious issue.[/quote] Yes, I read it and this is why I would like to open the SMS up and to see myself what it does. I still have no idea who to open it. I do ...
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I would try reducing the level of lowest channel or only play left or right side (if stereo ULF). Then run your experiment again.
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Hello, Ulf, and Happy New Year. Slightly OT, I realize, but have you tried at all to optimize the L Cao driver as a direct radiator, and disregarding LF? Do you have any impressions of this driver above 300 - 400 Hz and below 4.5 - 6k Hz, with respec...
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That attic is a lot of space to perhaps return to a midbass horn, should you be so inclined.Is the IB ULF run from DSET or a separate amplifier?...
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Sounds like the title to a poem!I'd go with the RCRC crossover... Why? Its cheaper, and as Paul mentions, until you introduce the final character (uncle ULF), the real end of the story is impossible to write.
jd*...
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[quote user="jessie.dazzle"] Below a certain frequency the advantages become a handicap. At that point (if you were using its EQ capabilities), the SMS -1 would start to step in... Whether you reach that point with your 10" arrays depends on how low ...
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Awhile back I had a conversation via email with Tom Danley concerning the Phoenix Gold Cyclone that he developed for Phoenix Gold and the car audio market. They were not well built by Phoenix Gold with some crucial parts made of plastic (although...
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Ok, I did try the 4th order filter and it did not sound as I wanted. The 3rd order is right slope foe my room but I need to go for custom filters separately dedicated for right and left channels. The problem is my right channel with the att...
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Paul, I can olny speak within my context and with no audio tests, only knuckling.I use pure silca sand in 3 granulations (2 of them fine unfortunately), mixed with steel shots.Of course the sand is there to quench the steel ringing. But while achievi...
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Here is an image depicting the radiation pattern of the HF for a midbass with and without phase plug. The dotted line represents the HF output. This is not a measured response!Here are a couple of pictures that may be amuzing. My girlfriend and the s...
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The new parts I needed to build the new crosovers arrived about a week ago, but I have been otherwise busy (for a change...), and now I've managed to get sick, so I am still only mentally toying with the project. I will try to work in some bread boar...
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In he French Horns/drivers shootout thread:
http://www.romythecat.com/Forums/ShowPost.aspx?postID=15130#15130
Jessie wrote:
[quote user="jessie.dazzle"]…I'll definitely let you know if I get the system up and running again befo...
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Sure, we can "overcome" the "sonic obstacles" and wind up in Audio Heaven, and there seems to be any number of ways this can happen. I really wish I knew how to make this continuous! Of course, many experienced people have sung the praises of Dr. Gaw...
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Bill, I am happy that you've improved your bass. As Romy mentioned in an earlier post about Bruckner, RTA is just one tool, and we have to listen and hear results with Music we know and love. When you told of the disappearing S2s, I was going to ment...
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The twins were born in mid of august last year. Since then I
had time and strength to finicky with my playback here and there. It is not set
ups up to my standard yet and the playback is not properly imbedded into my new
listening room. The people...
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Paul, if by error correction you mean frequency correction then I was thinking about +/- the same.i) Active filters; I have zero experience with crossing-over but people who seem to know what theyare talking about all agree that at ULF active is the ...
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I got my last PP2000, after the repair was done. My second new unit works since I got it repaired; it runs the whole playback, sounding very well and my attempts to add a second PP2000 led, as I described to worsening of sound. In the very deep core ...
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I do not know folks, I never was happy with isolation transformers. Perhaps I did not have the right isolation transformers but what I had was not good enough. Perhaps we have different electricity problem in my and your countries…. Whatever I had ma...
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This whole 833 A2 concept, given the constraints,is a no go. When driven positive, the grid equivalent resistance drops down to 1/transconductance level. For 833, being a high-gm tube,this can be as low as 100R. In order not to distort significantly ...
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Dear Malinowski,The basic idea for phase plugs is that the sound from all points of the diaphragm should arrive to the throat at the same time. For the midbass horn we only used a simple one slit plug. If you feel up to it you could make a more...
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Jessie, we keep meeting at the same intersection. Like I said before, I agree that direct radiators suck, for all the reasons you cited. But if what you say about horns is strictly and completely true, then does it not follow in spades at ever lower...
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