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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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It seems that brainlessness knows no limits. Both Mr. Hansen and Mr. Rankin speak nonsense. Wasting time on text like this is like reading the brochures from extreme audio equipment. All the things that "audiophiles" expect someone to say, get sa...
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Remember wirewrap with the sharp cornered posts? The amplifiers that I built that way are still noise free after 40 years. 20 turns or so per post work just fine and those connections can be shellacked....
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http://hifiknights.com/reviews/speakers/rdacoustic-evolution/I think that David should search here about full range speakers. As he obviously can't hear the difference, maybe reading about it will help improve his designs.David, just for your informa...
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I read an interesting post by Martin King, the MathCAD wizard that created some sheets to predict driver behaviour in different types of boxes. He had 3 groups of speaker enclosures: boxes so small that standing wave resonances (sealed and vented) ar...
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The music world has lost another great. Her thoughts on listening would benefit audio people everywhere!
http://www.factmag.com/2016/11/25/pauline-oliveros-dies-deep-listening-composer/
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http://twogoodears.blogspot.de/2009/12/goto-from-japan-drivers-and-horns.html
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Some drives do not get along with certain reflective surfaces. I had a Philips that played just about everything. Then I bought a Yamaha and all of the "gold" colored CDs would not play. I think that your dirt issue is not the real problem. If th...
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Interesting history!https://vimeo.com/179471456...
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All the best to the big family!...
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Amir,you have now posted twice that "proper" USB is better than SPDIF. The problem is that it isn't, unless someone makes up rules to define their own sense of better. The problem here is that they have not defined anything that is better. Both metho...
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What is the argument USB vs SPDIF all about? Blowing smoke because the music is not in the center of the discussion, rather bogus technical hypothesis.I do not even read that garbage anymore because 1) they have no technical background that relates n...
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How can a horn like this even get close to time aligned? Mount a tweeter 5 feet behind the mouth of this horn? I mean if it is only being built to play loud and without any advanced sonic requirements, then it is of limited interest here.I have never...
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I can understand wanting to reach out to audio people everywhere, but think that this speaker is a joke for many of us here. It certainly has nothing to do with advanced audio or evolved music reproduction. Even on a DIY site, how much traction does ...
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How do you even time align a Klipschhorn to any other driver? This is one of Romys axioms and I see no solution with folded horns. I am surprised that it was even mentioned!...
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I think that most of us here consider horns to be decade devices. That means about 3.5 octaves can be optimally covered. 800-8000Hz in your case. Extending the "highs" another octave means a couple of things. If a horn is "too short" you do not get m...
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Here is an excellent attic solution that will even allow for output to 1 Hz:
www.rotarywoofer.com
No problems with the suspension sag either!
[quote user="Romy t...
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On in my case is staying at operating temperature. All of my amps are tube......... My point is that if we can insert a UPS into the chain and improve sound, there is hope for the power supply! I don't really know of anyone using the batteries fr...
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[quote user="Romy the Cat"]rowuk , you are not wrong feeling that what we do with
PS and Mains regenerator is kind of ridicules. Indeed we convert AC to DC, then
to AC against and then to DC again. If you use SS then it very much makes sense
to ru...
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I have often thought that the necessity of a UPS comes from inadequate power supply design. Sure it is easy to buy a product to insert between the audio system and power line but at the end of the day, are we simply giving our power supplies an easie...
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Audio is a AC event not DC. There is no wind blowing except for poorly designed ports. There is no reason to "optimize" for lowest "drag". The air molecules bump into one another and really do not travel any distance. There are claims of better sound...
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I often wonder who REALLY needs real high end? Maybe this is the wrong description. If we look at custom made trumpets, violins, guitars for musicians, there are parameters that can be played with to reach a desired goal. The artisans results become ...
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Maybe we in Europe benefit from 230V with half the amperage and not the grounding scheme? Seems to me that line noise would scale down by factor 2 when we get 15V from 230V instead of 110V when using "analog" transformers.
[quote use...
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Thank you for sharing this. I have been experimenting with commercial switching supplies and various filtering schemes, but have not found a winning combination yet. I am very interested in trying this. Please make more info available....
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Wiki and google are not the best, but is a start:https://en.wikipedia.org/wiki/Compression_driverMass related horn issues:http://www.positive-feedback.com/Issue4/edgarinterview.htmhttp://volvotreter.de/downloads/Edgar-Show-Horn.pdfHorn loading:https:...
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Who says that a myth told a thousand times becomes more real? Who has actually measured the wear on the stylus instead of just "trusting" the industry?Romy may not be infallible, but he does only post first hand and for sure backs up his posts with f...
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Being a musician, I deal with constructive resonance every day. Tubes resonate as a function of length, boxes resonate as a function of the internal length, width, diagonals. Irregular shapes resonate as a function of volume, horns resonate as a func...
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Thinking about that new supertweeter or tapped horn subwoofer. This picture could give you an idea if something else in the house may be affected........
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For horns mounted on or near the floor, we have a phantom image below the floor plane. In theory, this means we could make that horn a half circle or similar, with a tremendous advantage in real estate. The theoretical advantages of reduced diffracti...
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There is not enough mass there for a 200Hz ring. I don't know what you are hearing, but you need to go back to whoever built these things and tell them your stories.
If you really believe that the horn is ringing, add mass, ...
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How did you determine that it is the horn. What makes you think that you can damp a horns mouth at 200 Hz. Have you never read what a room does to frequencies under 400 Hz? If not, check this site out: http://amroc.andymel.euMaxx, I think that you ar...
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